Old White Guys we Have to Know

Question 1

J.J. Thompson

Answer 1

Cathode Ray Experiment
-discovery of electron
-discovered mass to charge ratio

Creator of the Plum Pudding Model
-sphere of positive charge (+)
-electrons in the middle (-)

Question 2

Earnest Rutherford

Answer 2

Gold Foil Experiment
-there must be a dense space in the middle of the atom (NUCLEUS)
-lead to nuclear theory
1. most of mass is in nucleus
2. most of volume empty space

Question 3

Robert Millikan

Answer 3

Oil Drop Experiment
-discovered charge of single electron
-determined mass of electrons
-proved that electrons are smaller than the hydrogen atom

Question 4

Thomas Young

Answer 4

Double Slit Experiment (1801)
-light is a WAVE

Question 5

Albert Einstein

Answer 5

Photoelectric Effect (1905)
-light is a PARTICLE

Question 6

Johannes Rydberg

Answer 6

Rydberg Equation

Question 7

Niels Bohr

Answer 7

Bohr Model
-model for hydrogen atom to explain atomic spectrum (model w/ different energy levels e.g. n=1, n=2, etc.)

Question 8

Louis de Broglie

Answer 8

de Broglie Wavelength
-proposed electrons act like a wave
-wave nature explains why electrons don’t crash into one another
-wavelength given by equation (wavelength = h/(mv))