History Of The Atom

Question 1

Who made the first model of the atom and what was it?

Answer 1

John dalton- solid sphere

Question 2

Who made the second model of the atom and what was it?

Answer 2

Thomson - plum pudding model

Question 3

What was the plum pudding model?

Answer 3

Atom as a ball of positive charge with electrons stuck in it.(Thomson discovered electrons )

Question 4

Who made the third model of the atom and what was it?

Answer 4

Rutherford- nuclear model

Question 5

What is the nuclear model?

Answer 5

Discovered due to the alpha particle scattering experiments,the nuclear model has a tiny positively charged nucleus in the centre where most of the mass is concentrated. A cloud g negative electrons surrounds the nucleus. (Protons discovered by Rutherford)

Question 6

Who created the 4th model of the atom and what was it?

Answer 6

Bohr-nuclear model

Question 7

What is the nuclear model?

Answer 7

Bohr’s nuclear model of the atom suggests that electrons orbited the nucleus in fixed shells.

Question 8

Who created the 5th/current model of the atom?

Answer 8

Chadwick

Question 9

What did James Chadwick discover?

Answer 9

James Chadwick carried out an experiment which provided evidence for neutral particles in the nucleus (neutrons).

Question 10

Mnemonic for order of discovery (scientists)

Answer 10

Don’t- dalton. Teach - Thomson. Rude- Rutherford. Boys- Bohr. Chemistry - Chadwick.