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

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

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

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

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

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

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

A) Alpha and Gamma
B) Alpha
C) Alpha and Beta
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) All three types of radiation emit high energy particles which damage the molecules of the cells.
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.