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Inside the Atom

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Page 1: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Inside the Atom

Page 2: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Let’s Investigate the Atom

Page 3: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Atoms are composed of three type of particles: SUBATOMIC PARTICLES: protons, neutrons, and electron.

Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10-28 grams).

Page 4: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

What makes up the atom?

Protons and neutrons reside in the nucleus.

Protons have a positive (+) charge, neutrons have no charge. They are neutral.

Electrons are in orbitals, or electron clouds, around the nucleus. They have a negative charge (-).

Page 5: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)
Page 6: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Atomic Number

The number of _________ in the nucleus of an atom determines an element's atomic number.

Page 7: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

So what is the Atomic Number?

Page 8: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

6

CCarbon12.011

Atomic number.Atomic symbol

Element name

Average atomic mass -

*To find the number of protons, see the atomic number.*To find the number of electrons (see the atomic number, adjust for

charge if there is one)*To find the number of neutrons, subtract the atomic number from the atomic mass. Use whole number. Atomic mass -- 12

Atomic # - 6 6 neutrons

Page 9: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

The number of electrons, protons, and neutrons can be changed in an atom and changes the atom!

Page 10: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

I. Changing Electrons

An atom that changes the number of electrons is called an __________.

The number of ________ and ________ stays the same. No change in atomic number or ____________ ______________.

Page 11: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

II. What is make an ion?

If the atom loses electrons, the atom becomes ____________ charged.

If an atom gains electrons, the atom becomes ____________ charged.

Page 12: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Positive ion______________

(4 +) + (3-) = 1+

Page 13: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Negative ion______________

(4 +) + (5-) = 1-

Page 14: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

III. Changing Neutrons

Changing the number of neutrons in an atom makes an ________________.

Have the same _______ _____________

Have different mass numbers (number of __________ + ___________)

Page 15: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

IV. Changing Protons

Changing the number of protons causes ________________- changing from one element to another.

The _________________and __________________ changes

Page 16: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Sample Problem 1: For an atom with 15 protons, 16 neutrons, and 18 electrons…

What is the atom’s net charge?

What is the atomic number of the atom? What is the mass number?

This is an atom of what element?

Page 17: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Sample Problem 2: For an atom with 28 protons, 31 neutrons, and 26 electrons…

What is the atom’s net charge?

What is the atomic number of the atom? What is the mass number?

This is an atom of what element?

Page 18: Protons and neutrons are responsible for most of the atomic mass of an atom, while electrons contribute a very small amount of mass(9.108 X 10 -28 grams)

Vocabulary

79. Democritus80. John Dalton81. Atomic theory82. J.J. Thomason83. Ernest Rutherford84. Niels Bohr85.James Chadwick86.Electron clouds87.Nucleus88.Protons89.Neutrons90.Electrons91.Atomic mass92.Atomic number93.Ion94.Isotope95.Transmutation


Protons: 79 Electrons: 79 Neutrons: 118 Mass # : 197

Protons Identify an Element/atom (2 protons = Helium) Protons + Neutrons = Atomic Mass/Weight ( 2 Protons + 2 Neutrons = 4 AMU ) Chemical Properties

Chapter 11: The Atomic Nature of Matter · • Atomic mass number = sum of protons and neutrons Eg. Most carbon has 6 protons and 6 neutrons, so atomic mass number is 12 amu. About

Describe the mass, charge, and location of protons, neutrons, and electrons in atoms. S-105

Atoms are the smallest form of matter Nucleus: ◦ Protons (positive) ◦ Neutrons (neutral) ◦ Protons & neutrons make up most of the atom’s mass Energy

9.108 - SenR manifest2

AS Chemistry – Atomic structure and bonding. Sub-atomic particles Protons – mass 1; charge +1 Electrons – mass 1 / 1840 ; charge –1 Neutrons – mass 1;

Unit 2 Chemistry. Atomic Mass and Isotopes While most atoms have the same number of protons and neutrons, some don’t. Some atoms have more or less neutrons

Physics Department - Large Hadron Collider (LHC) and origin of mass … · 2017. 4. 19. · The mass of 3 quarks making up protons and neutrons is 3 × 5 MeV ≃ 15MeV The mass of

Mass laws Law of Conservation of Mass Law of Constant Composition Law of Multiple Proportions Structure of the Atom Nucleus (protons and neutrons) Electrons

Unit F321 Module 1.2.1 Electron Structure. Atomic Structure Protons, neutrons, electrons How to make ions Relative atomic mass

Catalyst: 10.27.2008 Find the atomic #, mass #, # protons, # electrons, and # neutrons for the following elements: Beryllium & Lithium

4.5. Fission, nuclear reactor Energetics: from the mass ......η= number of fission neutrons/number of absorbed neutrons = ... (spallation reaction at high energies, GeV-proton accelerator)

Mass # atomic # protons + neutrons = protons = Atomic Symbols

Chemistry, Water and pH. Atom Structure Matter Mass Space Made up of atoms Protons Neutrons Electrons

The structure of an Atom The basic parts of an atom includes; Neutrons Neutrons Protons Protons Electrons (mass is negligible). Electrons (mass is negligible)

ElementSymbol # of protons # of neutrons # of electron Atomic # Mass # Oxygen8816 SiliconSi141428 AluminumAl141313 Iron2656 Ca202040 BELLWORK: WEDNESDAY

Therefore: There are 3 subatomic particles: protons, neutrons and electrons. These are measured in “ atomic mass units ” ( amu ) as their mass is so small

Atomic Structure 1. Atomic and Mass Number The number of protons in an atom = atomic number (symbol “Z”) The mass = protons + neutrons (symbol “A”) Mass

Neutral Particles. Neutrons Neutrons are like neutral protons. –Mass is 1% larger –Interacts strongly Neutral charge complicates detection Neutron lifetime

Atomic Number & Mass Number Atomic number = the number of protons Mass number = the number of nucleons (protons & neutrons) A neutral atom has the same

Using radioactivity in dating Reviewing basic atomic structure Nucleus –Protons – positively charged particles with mass –Neutrons – neutral particles

1. I have 22 neutrons and a mass of 40. 2. I have 37 protons and 39 electrons. 3. I have 22 neutrons and 19 protons

Protons, Neutrons, and Electrons. Subatomic Particle ChargeLocationRelative Mass ElectronNegativeOutside Nucleus Very Small ProtonPositiveInside Nucleus

ElementSymbol Atomic Number Atomic Mass # Protons # Electrons # Neutrons OXYGEN O COBALT Co LEAD Pb

No Slide Title · Atoms are composed of PROTONS NEUTRONS ELECTRONS + positively charged mass = 1.6726 x 10–27 kg neutral mass = 1.6750 x 10–27 kg negatively charged – • mass

Protons, neutrons and electrons are with different properties · Protons, neutrons and electrons are sub-atomic particles with different properties: Sub-atomic particle Charge Mass

Chapter 2 Molecules of Life. The Atom Fundamental unit of matter Nucleus Protons: Positive charge; mass of 1 Neutrons: No charge; mass of 1 Electrons

Gravity Tests with Quantum Objects - NIST Center for ... neutrons Hartmut 9 Abele, Vienna University of Technology Neutrons are abundant: 1/7 of the baryonic mass of the universe are

6. (A) · 2020. 5. 5. · I. 2. 3. 4. .. r: 5. ' f. -2-'Mass number' is the number of (A) neutrons plus protons (B) neutrons minus protons (C) electrons plus neutrons (D) electrons

Protons, Neutrons, Electrons/Isotopes/Average Atomic Mass

Modern Physics By Neil Bronks Atoms C 12 6 Mass Number Mass Number - Number of protons + Neutrons. Atomic Number Atomic Number - Number of protons In

Chemistry 20 Review Electrons, Protons, Neutrons Atomic/Molar Mass

Introduction to the Atom, Protons, Neutrons, Electron, Nucleus, Atomic Mass, Quiz Game

Overview. Nucleus = Protons+ Neutrons nucleons A = nucleon number (atomic mass number) Gives you mass density of element Z = proton number (atomic number)