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Democritus Dalton Modern

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Presentation on theme: "Democritus Dalton Modern"— Presentation transcript:

1 Democritus Dalton Modern
ATOMIC THEORIES Democritus Dalton Modern

2 1st Atomic Theory

3 1st Atomic Theory Democritus (Greek 400 B.C.)

4 1st Atomic Theory Democritus (Greek 400 B.C.)
Matter is made of tiny particles, “atoms.”

5 1st Atomic Theory Democritus (400 b.c.)
Matter is made of tiny particles, “atoms.” Different types of atoms exist for every type of matter.

6 1st Atomic Theory based on Science

7 1st Atomic Theory based on Science
John Dalton (English 1803)

8 1st Atomic Theory based on Science
John Dalton (English 1803) All matter is made of indivisible atoms.

9 1st Atomic Theory based on Science
John Dalton (English 1803) All matter is made of indivisible atoms. All atoms of an element are alike.

10 1st Atomic Theory based on Science
John Dalton (English 1803) All matter is made of indivisible atoms. All atoms of an element are alike. Atoms of different elements are different.

11 1st Atomic Theory based on Science
John Dalton (English 1803) All mater is made of indivisible atoms. All atoms of an element are alike. Atoms of different elements are different. Compounds form when atoms bond.

12 1st Atomic Theory based on Science
John Dalton (English 1803) All mater is made of indivisible atoms. All atoms of an element are alike. Atoms of different elements are different. Compounds form when atoms bond. In a given compound, the number and kind of atoms is constant.

13 Modern Atomic Theory

14 Modern Atomic Theory Atoms ARE divisible; they are made of subatomic particles

15 Modern Atomic Theory Atoms ARE divisible; they are made of subatomic particles protons and neutrons in a nucleus surrounded by:

16 Modern Atomic Theory Atoms ARE divisible; they are made of subatomic particles protons and neutrons in a nucleus surrounded by electrons in an electron cloud

17 Modern Atomic Theory Atoms ARE divisible; they are made of subatomic particles protons and neutrons in a nucleus surrounded by electrons in an electron cloud Number of neutrons can vary, creating isotopes.

18 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus - first atomic theory

19 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier

20 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier - Law of conservation of mass (The mass of a product is always the same as the mass of the reactants. Matter isn’t created or destroyed.)

21 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust

22 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust - Law of definite proportions (A given substance always has the same elements in the same proportions.)

23 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust Dalton- Law of multiple proportions (If two elements contain the same elements, the elements always combine in small whole number ratios.)

24 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust Dalton- Law of multiple proportions - 2nd Atomic Theory

25 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust Dalton Thomson - protons and electrons

26 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust Dalton Thomson Rutherford - nucleus

27 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust Dalton Thomson Rutherford Chadwick - neutrons

28 Modern Atomic Theory Contributors to the modern atomic theory:
Democritus Lavosier Proust Dalton Thomson Rutherford Chadwick

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