Developing The Atomic Model

Question 1

What did Dalton discover

Answer 1

Atomic theory

Question 2

What did Thomson do?

Answer 2

He found the electron and made the plum pudding model

He suggested that atoms are spheres of positive charge with electrons dotted inside

Question 3

What did Rutherford do?

Answer 3

Discovered that most of the atom in an empty space has a dense central nucleus.

Made the planetary model

Suggested electrons orbit the nucleus like planets in a solar system.

Question 4

What did Bohr do?

Answer 4

Bohr showed that electrons occupy fixed levels energy levels or shells around the nucleus