CP Unit 2.2 Atomic Theory Review Game

The atomic number is always the number of

• neutrons

• protons

• mass

• isotopes

The mass number is

• the number of protons

• the number of electrons

• the protons + neutrons

• element identity

Atomic mass is

• a whole number

• an average of the masses of an element's isotopes

• not on the periodic table

• number of electrons

Democritus said that the world is made up entirely of empty space and

• "atomos"

• protons

• electrons

• neutrons

Tags

NGSS.MS-PS1-1

The cathode rays in the cathode ray tube experiment J.J. Thomson studied were actually

• protons

• electrons

• neutrons

• alpha particles

The gold foil experiment that Ernest Rutherford worked on determined that atoms actually contained these 2 things

• a nucleus

• empty space

• protons

• neutrons

Tags

NGSS.MS-PS1-1

Thomson's plum pudding model claimed these 2 things:

• the mass of the atom was spread evenly like a solid ball

• the atom was mostly empty space

• there was dense nucleus at the center

• electrons were spread throughout the atom

Tags

NGSS.MS-PS1-1

Rutherford described the nucleus in these 2 ways

• wide spread

• dense

• positive

• negative

Today we know Rutherford's description of the nucleus being positive makes sense because the only two particles contained there are

• protons

• neutrons

• electrons

• alpha particles

Tags

NGSS.MS-PS1-1

This subatomic particle has the least mass by far and is therefore not considered in the mass number

• protons

• neutrons

• electrons

• alpha particles