Scientists and their experiments

Question 1

Dalton Theory

Answer 1

1) All matter is made of atoms. Atoms are indivisible and
indestructible.
2) All atoms of a given element are identical in mass and
properties.
3) Compounds are formed by a combination of two or more
different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.

Question 2

Dalton Experiment

Answer 2

Electrolysis

Question 3

Dalton’s Model

Answer 3

Billard Ball

Question 4

Thomson experiment

Answer 4

Cathode ray tube

Question 5

Thomson’s contribution

Answer 5

Father of the e-, Mass to charge the ratio of the e-

Question 6

Thomson’s Model

Answer 6

Plum Pudding

Question 7

Milikan’s Experiment

Answer 7

Oil drops

Question 8

Milan’s contribution

Answer 8

found the charge and mass of the e-

Question 9

Rutherford experiment

Answer 9

Gold foil

Question 10

Rutherford discovered…

Answer 10

Most particles passed through
undeflected, rare number of deflections with
large angles

Question 11

Rutherford’s main contribution

Answer 11

nucleus is a tiny dense, positive
center of the atom, surrounded by an e- cloud

Question 12

Rutherford’s model

Answer 12

E-cloud

Question 13

Chadwick contribution

Answer 13

Discovered the neutron

Question 14

Bohr experiment

Answer 14

Emission spectra

Question 15

Bohr’s contribution

Answer 15

e- reside in energy shells at fixed distances away from the nucleus.

Question 16

Bohr’s Model

Answer 16

Planetary