Apologia Physical Science Module 13 Strong and Weak Force

What is a collection of atoms that all have the same number of protons?

• atom

• molecule

• element

What is the center of the atom, containing the proton and neutron?

• atom

• nucleus

• electron

Two or more atoms that all have the same number of protons but a different number of neutrons are called...

• molecule

• element

• isotope

• atom

What do we call an atom whose nucleus is not stable?

• unstable molecule

• unstable atom

• radioactive atom

• radioactive isotope

What determines the atomic number of an element?

• The number of electrons

• The number of protons

• The mass number

How is atomic mass determined?

• By adding neutrons and electrons

• By adding isotopes and atoms

• By adding neutrons and protons

What causes the strong nuclear force?

• Exchange of gravitons

• Exchange of phone numbers

• Exchange of pions.

Which is larger?

• Proton

• Electron

A piece of paper is placed between a radioactive isotope and a person, which kind of radioactive particle will the person be protected from?

• alpha

• beta

• gamma

A radioactive isotope has a half-life of 3.0 hours. If a scientist has 30 grams of the isotop, how much is left after 15 hours?

• none will be left

• all will left

• 0.9373 g (who has time in a quizziz to figure this out!)