Atomic theory

What does indivisible mean

Unable to break or separate

Who first believed the atom was a thing

The Greeks

What were the Greeks great at

Thinking (they were philosophers)

What elements did the Greeks think everything was made of

1. Earth

2. Fire

3. Air

4. Water

Who was the first person to write down atomic theory (who developed the idea of atoms 2,000 years after it was put forward by the Greeks)

John Dalton

What were the 4 assumptions of Daltons atomic theory

1. They are indivisible and indestructible

2. Atoms of the same element are identical

3. Atoms of different elements a vary in mass

4. Compounds contain atoms of two or more elements combined together in fixed whole number ratios

What’s diffusion

The spreading out of one set of particles into other particles

What’s “The Law of Conservation of Mass”

In any chemical reaction, you cannot create or destroy matter it can only change from one form to another (all atoms created in the Big Bang billions of years ago are still here today)