john dalton’s atomic theory elements composed of small particles called “atoms” all atoms of...

9

John Dalton’s Atomic Theory John Dalton’s Atomic Theory Elements composed of small Elements composed of small particles called “atoms” particles called “atoms” All atoms of a given All atoms of a given element are the same, but element are the same, but different from other different from other elements elements Small, indivisible spheres Small, indivisible spheres

Upload: dortha-shaw

Post on 06-Jan-2018

216 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

DESCRIPTION

Rutherford’s Experiment  Kiwi physicist Ernest Rutherford  Shot alpha particles at thin gold foil  alpha particles: –A form of radioactivity (+ charge)  When an alpha particle hits a fluorescent screen, it glows.

TRANSCRIPT

Page 1: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

John Dalton’s Atomic TheoryJohn Dalton’s Atomic Theory Elements composed of small Elements composed of small

particles called “atoms”particles called “atoms” All atoms of a given element All atoms of a given element

are the same, but different are the same, but different from other elementsfrom other elements

Small, indivisible spheresSmall, indivisible spheres

Page 2: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

Rutherford’s ExperimentRutherford’s Experiment Kiwi physicist Ernest RutherfordKiwi physicist Ernest Rutherford Shot alpha particles at thinShot alpha particles at thingold foilgold foil

alpha particles: alpha particles: – A form of radioactivity (+ charge)A form of radioactivity (+ charge)

When an alpha particle hits a fluorescent When an alpha particle hits a fluorescent screen, it glows.screen, it glows.

Page 3: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

Lead block

Uranium

Gold Foil

Fluorescent Screen

Page 4: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

He ExpectedHe Expected The alpha particles to pass through The alpha particles to pass through

without changing direction very much.without changing direction very much.

Page 5: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

What he got

Page 6: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

How Rutherford explained results

Atom is mostly empty Atom is mostly empty space.space.

Small dense,Small dense,positive piece at positive piece at center. “NUCLEUS”center. “NUCLEUS”

Alpha particles Alpha particles are deflected by it if are deflected by it if they get close they get close enough.enough.

Page 7: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

J.J. Thompson (1897)J.J. Thompson (1897) Cathode Ray Tube ExperimentsCathode Ray Tube Experiments

Conclusions:Conclusions:• Stream of negative chargeStream of negative charge• Named “electrons”Named “electrons”• Must be some positive Must be some positive

charged parts, too.charged parts, too.

Page 8: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

Passing an electric current makes a Passing an electric current makes a beam appear to move from the beam appear to move from the negative to the positive endnegative to the positive end

Thompson’sThompson’s ExperimentExperiment

Voltage source

+-

Page 9: John Dalton’s Atomic Theory Elements composed of small particles called “atoms” All atoms of a given element are the same, but different from other

Voltage source

Thompson’sThompson’s ExperimentExperiment

By adding an magnetic field he found By adding an magnetic field he found that the moving pieces were negativethat the moving pieces were negative

+

-

Atoms, Molecules, and Ions Dalton’s Atomic Theory 1) Elements are made up of atoms 2) Atoms of each element are identical. Atoms of different elements

1 Chapter 2 Atoms, Molecules, and Ions. 2 Atoms and Atomic Structure Dalton’s Atomic Theory - 1808 1.- Elements are composed of small, nondivisible particles

Atoms: The Building Blocks of Matter. Dalton’s Atomic Theory (1803) 1.All matter is made of atoms. 2.Atoms of the same element are identical. Atoms of

Chapter 2 Elements & Atoms. Dalton’s Atomic Theory An element is composed of tiny particles called atoms. All atoms of a given element show the same chemical

Chapter 3: Atomic Structure. Scientists Democritus- Matter composed of atoms (indivisible) (~450B.C.) Democritus- Matter composed of atoms (indivisible)

Unit 1 Part 2: The Atom - · PDF file02.08.2017 · Dalton’s Atomic Theory (OLD) •All matter is composed of extremely small particles called atoms. •Atoms cannot be subdivided,

1 Dalton’s Atomic Theory (1808) 1. Elements are composed of extremely small particles called atoms. 2. All atoms of a given element are identical, having

Chapter Three. Dalton’s Atomic Theory: Every element is made of tiny, unique particles called atoms that cannot be subdivided Atoms of the same element

V.Montgomery & R.Smith1 Dalton’s Atomic Theory (1808) 1.All matter is made of tiny indivisible particles called atoms. 2.Atoms of the same element are

CH.3 ELEMENTS, ATOMS AND ISOTOPES Dalton’s Atomic Theory (1808) I.All matter is made of atoms II.Each element has its own kind of atom. Atoms of the

Ch. 5. 5.1 Dalton’s Atomic Theory 1.All elements are composed of indivisible atoms (atoms are divisible) 2.Atoms of the same element are identical 3.Atoms

Click to begin Nuclear Physics. Dalton’s Atomic Theory 1. All elements are composed of atoms, which are indivisible and indestructible particles. 2. All

Chapter 2 Atoms & Elements. Dalton’s Atomic Theory ( beginning of 19 th century ) All matter is composed of tiny, indivisible particles called atomsAll

ATOMIC STRUCTURE Modern theory of matter. LET’S REVIEW Dalton’s atomic theory – Elements are made of atoms ; all atoms of an element are identical, atoms

Dalton’s Atomic Model - Mister Tam's Science Resource · John Dalton (1766-1844) Dalton’s Atomic Model All matter is made up of atoms. John Dalton (1766-1844) Dalton’s Atomic

2 | 1 Chapter 2 Atoms, Molecules, and Ions. 2 | 2 Postulates of Dalton’s Atomic Theory All matter is composed of indivisible atoms. An atom is an extremely

Chemistry Atoms: The Building Blocks of Matter Dalton’s Atomic Theory (1808) Atoms cannot be subdivided, created, or destroyed Atoms of different

John Dalton’s Atomic Theory 1.Matter is composed of atoms. Atoms are composed of protons, neutrons and electrons 2.All atoms of the same element are identical

Chapter 2 - asc.ohio-state.edu€¦ · Atoms, Molecules and Ions I) Atoms A) Dalton’s Atomic Theory 1) Elements composed of minute, indivisible particles called, Atoms 2) Atoms

CHAPTER 4 – THE ATOM John Dalton’s Atomic Theory (19 th Century) 1) All matter is composed of small particles called atoms 2) All atoms of an element

History of the Atom Dalton’s Atomic Theory (1808) 1. Elements are composed of extremely small particles called atoms. All atoms of a given element are

Welcome to 3 · Dalton’s Model of the Atom (1803) 1. Matter is composed of atoms that are indivisible and indestructible. 2. All atoms of an element are identical. 3. Atoms of different

FOUNDATIONS OF ATOMIC THEORY - Weebly · 2019. 9. 17. · FOUNDATIONS OF ATOMIC THEORY ... Dalton’s theory summarized: 1. All matter is composed of atoms. 2. Atoms of a given element

Atoms, Molecules and Ions Chapter 2. Dalton’s Atomic Theory (1808) 1. Elements are composed of extremely small particles called atoms. All atoms of a

Chapter 2 Atoms and Elements. Dalton’s Atomic Theory ( beginning of 19 th century ) All matter is composed of tiny, indivisible particles called atomsAll

Atoms, Molecules, and Ions General Chemistry I CHM 111 Dr Erdal OnurhanSlide 1 Dalton’s Atomic Theory Based on 4 postulates o Elements are composed of

IPC 03A Atoms & Elements. Atomic Structure History: John Dalton Dalton’s Atomic Theory: Proposed that elements are _____________________________ identical,

Atomic Structure · Dalton’s Atomic Theory (1803) aka: 5 Postulates 1. All matter is composed of extremely small particles called atoms. (I agree with Democritus!) 2. All atoms

Chapter 2 · 2020. 8. 26. · Chapter 2 Atoms, Molecules and Ions I) Atoms A) Dalton’s Atomic Theory 1) Elements composed of minute, indivisible particles called, Atoms 2) Atoms

Atomic Structure Chapter 4. Dalton’s Atomic Theory 4.1 John Dalton – 18 th century All matter is composed of atoms All atoms of a given element are identical

Chapter 2 Atoms, Molecules, & Ions. Atomic Theory Elements composed of atoms Atoms can’t be changed Compounds of multiple atoms John Dalton

Chapter 3 Atoms and Elements - chemvision.netchemvision.net/10_Chapter3_Timberlake.pdf · In Dalton’s atomic theory, atoms • are tiny particles of matter. • of an element are

1 Nuclear Energy Chapter 16. Atoms and Radioactivity All common forms of matter are composed of atoms. All atoms are composed of: 1) Protons (found in

Chapter 2: Phenomena - UCSB · Chapter 2: Atoms, Molecules, and Ions Atoms Dalton’s Model (1808) Each element is made up of tiny particles called atoms. The atoms of a given element

Copyright © Houghton Mifflin Company. All rights reserved. 4 | 1 Dalton’s Atomic Theory Elements are composed of tiny particles called atoms. All atoms