C3.2.1 - Evidence for Atoms

Question 1

Who were the first people to have ideas about atoms?

Answer 1

Indian and Greek philosophers

Question 2

Whose work did John Dalton build upon to find evidence that atom exist?

Answer 2

Antoine Lavoisier

Question 3

What did Antoine Lavoisier discover?

Answer 3

That air contained at least 2 gases

Question 4

Describe the steps that John Dalton took to making his discoveries about atoms.

Answer 4

1. He asked a question.
2. He suggested an explanation.
3. He tested his explanation.
4. Did the evidence support his conclusion?
5. If yes the explanation was accepted.
6. If no go back to step 2.

Question 5

List the details of John Daltons atomic model.

Answer 5

• Each element has its own type of atom.
• Every elements atom has a different mass.
• Compounds are made when different atoms join together.
• Atoms are rearranged in chemical reactions.