A) Stable
B) It is not known at this time
C) Their split evenly between stable and unstable
D) Unstable

A) Two of the answers are correct
B) Break into a lower atomic numbered atom
C) At some point give off radiation.
D) Become a higher atomic massed atom.

A) Prevents the protons from repelling the neutrons out of the nucleus.
B) Hold the neutrons together in the nucleus of an atom.
C) Prevents the electrons from flying off into space around the nucleus.
D) Prevents the positive charges of the protons from tearing the nucleus apart.

A) How long half of the material takes to decay.
B) How much of half of the material will decay in half the time.
C) Half of the time it takes all the material to decay.
D) How much of the material will decay in half a century.

A) Gamma
B) Alpha
C) Beta
D) Delta

A) Alpha
B) Beta
C) Gamma
D) Delta

A) Alpha
B) Beta
C) Gamma
D) Delta

A) Alpha and Gamma
B) Alpha and Beta
C) Alpha
D) Alpha, Beta and Gamma

A) Radiation has no known benefit to humans.
B) Many of the pioneers of nuclear physics died of prolonged exposure to radiation.
C) Radiation can cause ionization of the cell's molecules.
D) All three types of radiation emit high energy particles which damage the molecules of the cells.

A) Hold the neutrons together in the nucleus of an atom.
B) Prevents the protons from repelling the neutrons out of the nucleus.
C) Prevents the electrons from flying off into space around the nucleus.
D) Prevents the positive charges of the protons from tearing the nucleus apart.