Upload File

preap chemistry chapter 3. democritus was the early greek philosopher who is credited with the...

  • Home
  • Documents
  • PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible
83
PreAP Chemistry Chapter 3

Upload: clifford-shawn-norton

Post on 02-Jan-2016

217 views

Category:

Documents


1 download

Report

Tags:

TRANSCRIPT

Page 1: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

PreAP Chemistry Chapter 3

Page 2: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Page 3: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Law of Definite Proportions states that the elements in a specific compounds always contain the same proportions by mass.

Page 4: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Law of Multiple Proportions states that if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers

Page 5: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Dalton is an English school teacher who proposed the law of conservation of mass, the law of definite proportions, and the law of multiple proportions.

Page 6: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Dalton is an English school teacher who proposed the law of conservation of mass, the law of definite proportions, and the law of multiple proportions.

He is also known as the Father of the Atomic Theory

Page 7: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Dalton’s atomic theory1.All matter is composed of very small particles called atoms

Page 8: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Dalton’s atomic theory1.All matter is composed of very small

particles called atoms2.Atoms of a given element are

identical in size, mass, and other properties; atoms of different elements differ in these properties.

Page 9: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

3.Atoms cannot be subdivided, created, or destroyed

Page 10: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

3.Atoms cannot be subdivided, created, or destroyed

4.Atoms of different elements combine in simple whole-number ratios to form chemical compounds.

Page 11: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

3.Atoms cannot be subdivided, created, or destroyed

4.Atoms of different elements combine in simple whole-number ratios to form chemical compounds.

5.In chemical reactions, atoms are combined, separated, or rearranged.

Page 12: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Two aspects of Dalton’s atomic theory proven to be incorrect:

a.We now know atoms are divisible.

Page 13: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Two aspects of Dalton’s atomic theory proven to be incorrect:

a.We now know atoms are divisible.

b. Atoms of the same element can have different masses.

Page 14: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Atom --smallest particle of an element that retains the properties of that element.

Page 15: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Two regions of an atom1. Nucleus -- small region near the

center of the atom.

Composed of two particles—the proton which is positively charged and the neutron which is neutral (zero) charged.

Page 16: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

2. Electron Cloud --composed of negatively charged electrons. It is very large in comparison to the nucleus.

Page 17: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

2. Electron Cloud --composed of negatively charged electrons. It is very large in comparison to the nucleus.

Subatomic particles—protons, neutrons, electrons

Page 18: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

2. Electron Cloud --composed of negatively charged electrons. It is very large in comparison to the nucleus.

Subatomic particles—protons, neutrons, electrons

Cathode Ray tubes — the instrument used in the discovery of the electron

Page 19: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible
Page 20: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

J. J. Thomson is the man credited with the discovery of the electrons in the late 1800’s

Page 21: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

J. J. Thomson is the man credited with the discovery of the electrons in the late 1800’s

Millikan discovered the mass of the electrons

Page 22: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Knowledge of electrons led to two inferences about atomic structure:

1.Because atoms are electrically neutral, they must contain positive charge to balance the negative electrons.

Page 23: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Knowledge of electrons led to two inferences about atomic structure:

1.Because atoms are electrically neutral, they must contain positive charge to balance the negative electrons.

2.Because electrons have so little mass, atoms must contain other particles to account for most of their mass

Page 24: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Nucleus of the atom—discovered by Lord Ernest Rutherford

Page 25: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Nucleus of the atom—discovered by Lord Ernest Rutherford

Gold foil experiment—actually done by Hans Geiger and Ernest Marsden

Page 26: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Observations:a.Majority of the alpha (α) particles

penetrated foil undeflected.

b.About 1 in 20,000 were slightly deflected

c.About 1 in 20,000 were deflected back to emitter

Page 27: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible
Page 28: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Conclusions: 1. Mass of the atom and the positive charge are concentrated in small regions called nucleus

Page 29: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Conclusions: 1. Mass of the atom and the positive charge are concentrated in small regions called nucleus

2. Most of the atom is empty

Page 30: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Conclusions: 1. Mass of the atom and the positive charge are concentrated in small regions called nucleus

2.Most of the atom is empty

3.Magnitude of charge on the nucleus is different for different atoms

Page 31: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

4. Number of electrons outside the nucleus = number of units of nuclear charge (to account for the fact that the atom is electrically neutral)

Page 32: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

4. Number of electrons outside the nucleus = number of units of nuclear charge (to account for the fact that the atom is electrically neutral)

Atoms are electrically neutral because they contain equal numbers of protons and electrons

Page 33: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

1. What kinds of particles are being emitted by the radioactive source? What is their charge?

Page 34: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

1.What kinds of particles are being emitted by the radioactive source? What is their charge?

Alpha Particles, positive

Page 35: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

2. Toward what are the alpha particles being directed?

Page 36: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

2.Toward what are the alpha particles being directed?

Gold foil

Page 37: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

3.What happens when the charged particles strike the surface of the gold foil?

Page 38: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

3.What happens when the charged particles strike the surface of the gold foil?

Most go straight throughSome were slightly deflectedSome were greatly deflected

Page 39: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

4.What was the purpose of the fluorescent screen?

Page 40: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

4.What was the purpose of the fluorescent screen?

See where the alpha particles hit

Page 41: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

5.What did Rutherford conclude from this gold foil experiment regarding the amount of empty space in the atom? Why was he able to conclude this?

Page 42: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

5.What did Rutherford conclude from this gold foil experiment regarding the amount of empty space in the atom? Why was he able to conclude this?

Most of the atom is empty space because most of the particles went straight through.

Page 43: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

6.How does the deflection path of a charged particle that strikes the center of a gold atom differ from that path of a particle that passes only near the center?

Page 44: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

6.How does the deflection path of a charged particle that strikes the center of a gold atom differ from that path of a particle that passes only near the center?

If it hits the center it is deflected back to the emitter. If it passes near the center it is slightly deflected.

Page 45: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

7.Based on this experiment, where is most of the positive charge and mass of an atom found?

Page 46: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

7.Based on this experiment, where is most of the positive charge and mass of an atom found?

Nucleus – in the center

Page 47: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

8.What would have been observed if the positive charge of an atom had been thinly spread out throughout the atom?

Page 48: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

8.What would have been observed if the positive charge of an atom had been thinly spread out throughout the atom?

All the alpha particles would have behaved the same – gone straight through.

Page 49: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Nuclear Forces the short-range proton-neutron, proton-proton, and neutron-neutron forces that hold the nuclear particles together

Page 50: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Nuclear Forces the short-range proton-neutron, proton-proton, and neutron-neutron forces that hold the nuclear particles together

Mass of one proton = mass of neutron = mass of 1837 electrons

Page 51: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Atomic number—the number of protons in the nucleus of the atom.

Page 52: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Atomic number—the number of protons in the nucleus of the atom.

--number of protons identifies the element and is equal to the number of

electrons (of a neutral atom)

--symbol is Z

Page 53: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Isotopes are atoms of the same element that have different masses because they have different numbers of neutrons but they still have similar chemical properties

Page 54: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Isotopes are atoms of the same element that have different masses because they have different numbers of neutrons but they still have similar chemical properties

Mass number – approximate atomic mass of an atom (nucleus)

-- the number of protons + neutrons

Page 55: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Mass Number of Isotope

Number of Protons Number of Neutrons

8 6 2

9 6 3

10 6 4

11 6 5

12 6 6

13 6 7

14 6 8

15 6 9

16 6 10

17 6 11

18 6 12

19 6 13

20 6 14

Isotopes of Carbon

Page 56: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Isotopes of CarbonMass Number of Carbon

IsotopesName of Isotopes

8 carbon-8

9 carbon-9

10 carbon-10

11 carbon-11

12 carbon-12

13 carbon-13

14 carbon-14

15 carbon-15

16 carbon-16

17 carbon-17

18 carbon-18

19 carbon-19

20 carbon-20

Page 57: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Nuclide is the general term for any isotope of any element

Page 58: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Nuclide is the general term for any isotope of any element

Atomic Mass Unit (amu) is exactly 1/12 the mass of a carbon-12 atom

Page 59: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Average atomic mass is the weight average of the atomic masses of the naturally occurring isotopes of an element.

Ave. Atomic mass = %abundace(mass of isotope 1) + %abundance(mass of isotope 2) +…..

Page 60: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Moles

Mole (mol) is the amount of a substances that contains as many particles as there are atoms in exactly 12 g of carbon-12

(Mole comes from the German word for “pile”)

Page 61: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible
Page 62: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Avogadro’s number – 6.022 ×1023 – is the number of particles in exactly 1 mole of a pure substance. Just as one dozen = 12 somethings, one mole = 6.022 ×1023 somethings.

Page 63: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

The mass of one mole of a pure substance (element or compound) is called the molar mass of that substance. The unit is g

mol

Page 64: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

Mole Review

Page 65: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible
Page 66: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many grams are in 2.0 mol Carbon?

Page 67: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many grams are in 2.0 mol Carbon?

2.0 mol C

Page 68: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many grams are in 2.0 mol Carbon?

2.0 mol C

1 mol C

Page 69: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many grams are in 2.0 mol Carbon?

2.0 mol C 12 g C

1 mol C

Page 70: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many grams are in 2.0 mol Carbon?

2.0 mol C 12 g C= 24 g C

1 mol C

Page 71: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many moles are in 0.58 g Al?

0.58 g Al

Page 72: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many moles are in 0.58 g Al?

0.58 g Al

27 g Al

Page 73: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible
Page 74: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many moles are in 0.58 g Al?

0.58 g Al 1 mol Al

27 g Al

Page 75: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many moles are in 0.58 g Al?

0.58 g Al 1 mol Al= 0.021 mol Al

27 g Al

Page 76: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many moles are equal to 1.20 x 1025 atoms of sodium? (Na)

1.20 × 1025 atom Na

Page 77: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many moles are equal to 1.20 x 1025 atoms of sodium? (Na)

1.20 × 1025 atom Na 1 mol Na= 19.9 mol Na

6.022 × 1023 atoms

Page 78: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many atoms are in 0.750 mol of zinc? (Zn)

Page 79: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

How many atoms are in 0.750 mol of zinc? (Zn)

0.750 mol Zn 6.022 × 1023

= 4.52 × 1023 atoms Zn1 mol Zn

Page 80: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

What is the mass in grams of 4.75 x 1024 atoms of silver? (Ag)

Page 81: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

What is the mass in grams of 4.75 x 1024 atoms of silver? (Ag)

4.75 × 1024 atoms Ag 1 mol Ag 107.9 g Ag

= 851 g Ag

6.022 x 1023 atoms 1 mol Ag

Page 82: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

What mass of Antimony (SB) contains the same number of atoms as 9.0 g of aluminum?

Page 83: PreAP Chemistry Chapter 3. Democritus was the early Greek philosopher who is credited with the concept of the atom (atomos) –which means invisible

What mass of Antimony (Sb) contains the same number of atoms as 9.0 g of aluminum?

9.0 g Al 1 mol Al 1 mol Sb 122 g Sb

= 41 g Sb

27 g Al 1 mol Al 1 mol Sb


Chapter 2 (Part I) Atoms, Molecules, and Ions History n Greeks n Democritus and Leucippus - atomos n Aristotle- elements n Alchemy n 1660 - Robert Boyle-

The History of the Atom……. Democritus was the first to theorize that all matter was composed of atoms! The name atom comes from his Greek word, “atomos”,

ATOMIC STRUCTURE ? Kenneth E. Schnobrich. A Brief History About 460 B.C. - a Greek Philosopher, Democritus, developed the idea of atoms (atomos) as small

Atomic Theory Past and Present. A. Democritus (400 BCE) Matter is made up of particles called “atomos” or atoms

Unit 2: Atomic Theory and Structure. (c. 400 B.C.) Democritus proposed that “atomos” are indivisible. Atom: smallest particle of matter that retains its

Atom Teorileri - Siirt Üniversitesi2 Atom Kuramı Milattan önce beşinci yüzyılda, yunan filozofu Democritus, bütün maddeleri, bölünemez veya kesilemez anlamında atomos olarak

Atoms and the Periodic Table The Atom Ch. 4. Democritus (400 BC) Greek philosopher. All things are composed of tiny, indivisible particles: called: Atomos

Development of Atomic Theory 400 B.C. -Democritus was first to use the word : atom atomos meaning “indivisible” Aristotle (famous philosopher) disputed

Dismissed idea of the atom. Early Greeks Two schools of thought: Matter is made of indestructible particles called “atomos” Plato (428-348 BC) Democritus

Atoms, Molecules, and Ions Chapter 2. Democritus 460 BC 460 BC First to propose atomic nature of matter First to propose atomic nature of matter “atomos”

Chapter 2 Atoms, Molecules, and Ions History n Greeks n Democritus and Leucippus - atomos n Aristotle- elements. n Alchemy n 1660 - Robert Boyle- experimental

Development of the Atomic Theory. Democritus 460 BC - Greek philosopher proposes the existence of the atom ; calls it Atomos meaning indivisible. His

Atom Teorileri - siirt.edu.tr · 2 Atom Kuramı Milattan önce beşinci yüzyılda, yunan filozofu Democritus, bütün maddeleri, bölünemez veya kesilemez anlamında atomos olarak

(c) McGraw Hill Ryerson 2007 1.3 Atomic Theory Early ideas about matter The Greek philosopher Democritus believed that matter was made of atomos that were

The Atom. The Building Block of Matter 400 BC Democritus (Greek Philosopher) Atomos = “indivisible” …like a brick is used to build a building; an

Chapter 2 Atoms, Molecules, and Ions Early Atomic Theory History n Democritus – “Atomos” (has idea of atoms) n John Dalton & His Laws n J.J. Thompson

CHAPTER 2-1 FEDEROFF. ATOMS Atom – is the basic unit of matter – Ex. Democritus – breaking a piece of chalk, when is it not chalk anymore? Until atomos

Section 1: The Components of Matter - core.ac.uk · z The word "atom" is derived from the Greek word "atomos", meaning indivisible. z The philosopher Democritus (460-370 B.C.) believed

Concept of the Atom Democritus 400 B.C.E., Greece Democritus

Chapter 2 Notes Atomic Structure. Atoms Democritus – Ancient Greek Science dude, 1 st proposed the idea of atoms, tiny indivisible particles Atomos –

Atomic Theory. Democritus – 460 – 370 BC Matter consisted of tiny particles “atomos” Ideas were wrong

ATOMOS ISOELECTRICOS

The Chemistry of Life. Atoms The basic unit of matter Greek, atomos meaning “unable to cut” Named after Democritus...there has to be a limit =atom

1.cdn.edl.io · Web viewBasic Overview of Atomic Theory Atomic Theory – History Democritus – “ Atomos ” – indivisible particles Lavoisier – Law of Conservation of Mass/Matter

Introduction to Atoms Chapter 4. Democritus Greek Philosopher “uncutable particle” Named the atom from the Greek word Atomos Atoms are small, hard,

History of the Atom. Democritus (400 BC) Proposed that matter was composed of tiny, invisible particles. Gr. atomos

Atomos y Estructuras del los atomos

Chapter 2 Atoms, Molecules, and Ions History n Greek philosophers n Democritus and Leucippus - atomos n Aristotle- 4 elements: Earth, Air, Fire, and

Chapter 4 Atomic Structure p. 101. Section 4.1 Defining the Atom Greek philosopher Democritus Greek philosopher Democritus suggested atoms (Greek “atomos”)

1 Chapter 5 Atoms, Molecules, and Ions 2 History n Greeks n Democritus and Leucippus - atomos n Aristotle- 4 elements. n Alchemy-experimentation n 1660

The History of Atomic Structure. Democritus Named the atom from the Greek word “atomos” meaning indivisible. Wrote that atoms were the smallest unit

Atomic Structure The Idea of the Atom Early Models Greek philosophers – 450 B.C. what is the smallest particle? Democritus - Particles are atomos An

Atomic Theory-Democritus Greek philosopher, 400 BC Greek philosopher, 400 BC Named the smallest piece of matter “atomos,” meaning “not to be cut.” Named

II. History of atomic structure A. Democritus – 500 BCE Theorized that matter is composed of small, indivisible particles = ATOMOS (Greek for indivisible)

Electrons in Atoms. Democritus (400 B.C.) Proposed that matter was composed of tiny indivisible particles Not based on experimental data Greek: atomos