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

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

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

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

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

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

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

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

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

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.