Contributions

Question 1

Suggested that matter is made up of atoms

Answer 1

Dalton

Question 2

Proposed that atoms negatively charged particles

Answer 2

Thomson

Question 3

Discovered the nucleus and it’s submotic particles , and suggested that nucleus was made up of positively charged called protons

Answer 3

Rutherford

Question 4

Proposed that electrons are located in shells around nucleus

Answer 4

Bohr

Question 5

Atoms cannot be created , destroyed , or divided into smaller particles

Answer 5

Dalton

Question 6

Electrons occupy specific energy levels or shells

Answer 6

Bohr

Question 7

Most of the mass of the atom is in the tiny , dense, positively charged nucleus

Answer 7

Rutherford

Question 8

Most of the atom is empty spaces

Answer 8

Rutherford

Question 9

All matter is made of small particles called atoms / all atoms of the same element are identical

Answer 9

Dalton

Question 10

Different elements are combine together to form compounds

Answer 10

Dalton

Question 11

Electrons moved around a central nucleus

Answer 11

Rutherford

Question 12

Proposed the “raisin bun” mode of atom

Answer 12

Thomson