People

Question 1

Determined that the mass of the the electron was much less than that of a hydrogen atom.

Answer 1

J.J. Thomson; 5

Question 2

Derived an equation that showed how electrons travel around the nucleus as a wave; had a cat that may or may not be alive

Answer 2

Erwin Schrodinger; 13

Question 3

Discovered negatively-charged particles in the green flash of a cathode ray tube.

Answer 3

Sir William Crookes; 4

Question 4

Discovered that atoms of each element have different numbers of protons.

Answer 4

Henry Moseley; 11

Question 5

Discovered the neutron.

Answer 5

James Chadwick; 14

Question 6

Discovered the nucleus using the gold foil experiment.

Answer 6

Ernest Rutherford; 10

Question 7

Expanded on the work of Democritus; came up with six-part atomic theory.

Answer 7

John Dalton; 3

Question 8

First thought matter was made up of tiny particles called atoms.

Answer 8

Democritus; 1

Question 9

Found the charge and mass of an electron using the oil-drop experiment.

Answer 9

Robert Millikan; 9

Question 10

Proposed that electrons have wave-like behavior.

Answer 10

Louis de Brogile; 12

Question 11

Proposed that electrons orbit the nucleus in specific paths, like planets orbit the sun.

Answer 11

Niel Bohr; 11

Question 12

Proposed that light has dual nature; stated that light can be thought of as bean of photons.

Answer 12

Albert Einstein; 8

Question 13

Proposed that matter can gain or lose energy only in small, specific amounts (called quanta).

Answer 13

Max Planck; 6

Question 14

Proposed the plum pudding model of the atom.

Answer 14

J.J. Thomson; 7

Question 15

Thought matter was made up of four elements: earth, fire, water, and air.

Answer 15

Aristotle; 2