Presentation is loading. Please wait.

Presentation is loading. Please wait.

Atomic Theorists How we got to where we are now. Law of Conservation of Mass Matter can’t be created or destroyed Who: Antoine Lavoisier When: 1785 Where:

Published byShannon Barnett Modified over 9 years ago

Similar presentations

Presentation on theme: "Atomic Theorists How we got to where we are now. Law of Conservation of Mass Matter can’t be created or destroyed Who: Antoine Lavoisier When: 1785 Where:"— Presentation transcript:

1 Atomic Theorists How we got to where we are now

2 Law of Conservation of Mass Matter can’t be created or destroyed Who: Antoine Lavoisier When: 1785 Where: France

3 Law of Definite Proportions Compounds = Elements put together in fixed whole number ratios C + O 2  CO 2 Who: Joseph Proust When: 1797 Where: France

4 Law of Multiple Proportions Two elements can form more than one compoundelements compound The ratios of elements will be small whole numbers. Who: John Dalton Where: EnglandWhen: 1803

5 What: All matter is a combo of fire, air, earth or water When: 350 B.C. Where: Greece Who: Aristotle

6 Who: Democritus When: 400 B.C. Where: Greece What: Matter was made of indivisible substances he called atomos (1 st talk of the atom)

7 What: Solid Sphere Model (1 st atomic theory) Matter is made up of indivisible particles All atoms of a particular element are identical Different elements are composed of different kinds of atoms. Compounds are composed of atoms in specific ratios. Atoms are not created or destroyed in a reaction. When: 1805Where: England Who: John Dalton

8 How did Dalton do ? Matter is made up of indivisible particles No. Atoms can be divided All atoms of a particular element are identical No. Doesn’t account for isotopes Different elements are composed of different kinds of atoms. Yes! Compounds are composed of atoms in specific ratios. Yes! Atoms are not created or destroyed in a reaction. Yes!

9 What: Atoms aren't smallest particle Conducted experiment with a Cathode Ray Tube Particles had a negative charge (discovered electrons) Model = plum pudding When: 1897 Where: England Who: J.J. Thomson

10 Cathode Ray Tube

11

12 What: Experiments to determine mass of electron Conducted the oil drop experiment Verified that electron is negatively charged No new model Where: AmericaWhen: 1910 Who: Robert Millikan

13 Millikan Oil Drop Experiment

14 Who: Ernest Rutherford What: Conducted Gold Foil experiment Proved nucleus is dense, positively charged core of atom When: 1911 Where: America Model = Planetary Model

15 Rutherford’s Experiment Gold Foil Experiment

16

17 Who: Niels Bohr What: Pulsating Planetary Model Electrons can move between energy levels When: 1913 Where: Denmark

18 Who: James Chadwick What: Confirmed existence of neutron No new atomic model When: 1932 Where: England

19 Whose model of the atom is represented by this diagram? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

20 Whose model of the atom is represented by this diagram? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

21 Whose model of the atom is represented by this diagram? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

22 Whose model of the atom is represented by this diagram? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

23 Whose model of the atom is represented by this diagram? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

24 Whose model of the atom is represented by this diagram? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

25 Whose model of the atom has the name “Planetary Model”? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

26 Whose model of the atom has the name “Solid Sphere”? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

27 Whose model of the atom has the name “Pulsating Planetary Model”? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

28 Whose model of the atom has the name “Plum Pudding”? 1.Aristotle 2.Democritus 3.Dalton 4.Thomson 5.Millikan 6.Rutherford 7.Bohr 8.Chadwick 1234567891011121314151617181920 212223

Download ppt "Atomic Theorists How we got to where we are now. Law of Conservation of Mass Matter can’t be created or destroyed Who: Antoine Lavoisier When: 1785 Where:"

Similar presentations

History at a Glance Atoms.

History at a Glance Atoms.
Atomic Theory Timeline

Atomic Theory Timeline
History of Atomic Structure

History of Atomic Structure
Atomic Theory.

Atomic Theory.
Models of the Atom: A Historical Perspective

Models of the Atom: A Historical Perspective
The History of the Atom.

The History of the Atom.
Atoms: Development of the Atomic Theory

Atoms: Development of the Atomic Theory
Atomic Theory and the Atom

Atomic Theory and the Atom
Atoms: Development of the Atomic Theory

Atoms: Development of the Atomic Theory
Atomic History 3/23/15.

Atomic History 3/23/15.
THE HISTORY OF THE ATOM. Greek Philosophers (400 B.C.)  Aristotle- believed the everything was made of the 4 elements (air, fire, water, and land). Each.

THE HISTORY OF THE ATOM. Greek Philosophers (400 B.C.)  Aristotle- believed the everything was made of the 4 elements (air, fire, water, and land). Each.
AP Chemistry – Chapter 2 Atoms, Molecules and Ions.

AP Chemistry – Chapter 2 Atoms, Molecules and Ions.
Chapter 2 Atoms, Molecules, Ions.

Chapter 2 Atoms, Molecules, Ions.
The Atomic Model Chem 9.

The Atomic Model Chem 9.
Development of our understanding of the atom. Early Models Democritus was first to suggest atom in 4 th century B.C. Believed matter was made of tiny.

Development of our understanding of the atom. Early Models Democritus was first to suggest atom in 4 th century B.C. Believed matter was made of tiny.
Atomic Discovery Early Models of the Atom 400 B.C. – Democritus proposed the existence of fundamental particles of matter that were indivisible and indestructible.

Atomic Discovery Early Models of the Atom 400 B.C. – Democritus proposed the existence of fundamental particles of matter that were indivisible and indestructible.
History of Atomic Structure

History of Atomic Structure
What are important discoveries related to the structure of an atom?

What are important discoveries related to the structure of an atom?
Atoms and Moles Chapter 4 Approximately 2500 years ago Philosophers How many times can one divide something until there is nothing left?

Atoms and Moles Chapter 4 Approximately 2500 years ago Philosophers How many times can one divide something until there is nothing left?
Evolution of the Atomic Theory: from 400 B.C to late-20 th century Nazli Suyolcu 9D – Hisar Okullari.

Evolution of the Atomic Theory: from 400 B.C to late-20 th century Nazli Suyolcu 9D – Hisar Okullari.

Similar presentations

Ads by Google