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

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

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

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

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

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

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

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

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

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