Scientists

Question 1

Dalton

Answer 1

Atomic theory
Atoms of same element were identical and each element had different atoms
Everything is made from atoms
compounds are made by combining different kinds of atoms
atoms are rearranged in reactions

Question 2

JJ Thompson

Answer 2

Cathode Ray tubes, discovered the electron and devised the plum pudding model

Question 3

Rutherford

Answer 3

Gold foil experiment, discovered the nucleus

Question 4

Chadwick

Answer 4

discovered the neutron and that it held together the nucleus

Question 5

Heisenburg

Answer 5

Uncertainty theory, position and velocity of a particle can’t be determined.

Question 6

Schrodinger

Answer 6

came up with the idea of orbitals and the quantum mechanical model which gave the probability of finding an electron.

Question 7

Bohr

Answer 7

Came up with the planetary model which had energy levels for the electrons. Also came up with the hydrogen emission spectrum, where light was given off when electrons change levels.