Atoms Test Review

A neutral subatomic particle contained in the nucleus. 

• proton
• neutron
• electron
• positron

A positive subatomic particle found in the nucleus

• proton
• neutron
• electron
• positron

A negative subatomic particle

• proton
• neutron
• electron
• positron

Discovered the electron with the cathode ray tube experiment.

• John Dalton
• J.J. Thomson
• E Rutherford
• Neils Bohr

Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

• Atoms are made up of mostly empty space.

• Atoms are mainly solid and block alpha particles.

• The volume of the nucleus is large compared to the rest of the atom.

• The mass of the nucleus is small compared to the rest of the atom.

What is the mass number?

• The average atomic mass
• the number of protons and neutrons in the nucleus
• the number of protons in the nucleus
• the number of protons and electrons in the nucleus

What is the average atomic mass?

• The weighted average of all the naturally occurring isotopes.
• the same as the mass number
• the number of protons and neutrons in the nucleus
• the mass of all the electrons in an atom

An isotope of Carbon has 7 neutrons, what is its mass number?

• 7
• 6
• 13
• 1

How many protons in Neon - 22?

• 22
• 10
• 12
• 32

Most of the mass of an atom is contained in the ____?

• nucleus
• electron cloud