Brief History Of The Atom

Question 1

Responsible for Quantum Mechanics Model of an atom

Answer 1

Schrödinger

Question 2

Thomson

Answer 2

Designed the “Plum Pudding” model of an atom

Question 3

Discovered electrons

Answer 3

Thomson

Question 4

Rutherford

Answer 4

Discovered a positive core called a nucleus

Question 5

Designed the “Planetary” model of an atom

Answer 5

Bohr

Question 6

Rutherford

Answer 6

Discovered the atom was mostly empty space

Question 7

Started atoms are invisible

Answer 7

Dalton

Question 8

Schrödinger

Answer 8

Stated electrons move in orbitals(clouds of probability)

Question 9

Believed atoms of an element are identical

Answer 9

Dalton

Question 10

Bohr

Answer 10

He put electrons in fixed orbits around the nucleus

Question 11

Democritus

Answer 11

Solid sphere model

Atomos

Question 12

Dalton

Answer 12

1st atomic theory of matter

Atoms cannot be broken down into small particles

Question 13

Atoms mostly empty space

Answer 13

Rutherford

Question 14

Uncertainty principle

Answer 14

Heisenberg

Question 15

Probability clouds

Answer 15

Schrödinger

Question 16

Electrons into energy levels

Answer 16

Millikan

Question 17

Wave theory

Answer 17

De Broglie

Question 18

Charge of electron

Answer 18

Millikan

Question 19

Cathode ray tube

Answer 19

Thomson

Question 20

Wrong with Bohr model

Answer 20

Works with Only 1 electron

Question 21

Wrong with Rutherford Nuclear model

Answer 21

Could not explain why negatively charged electrons remain in orbit

Question 22

Wrong with Thomson plum pudding model

Answer 22

Distribution of positive and negative particles nor in uniform

Question 23

Fixed orbit around nucleus

Answer 23

Bohr

Question 24

Atoms are invisible

Answer 24

Dalton

Question 25

Identical atoms

Answer 25

Dalton