What is a radioactive substance?

Why are some nuclei unstable?

An unstable nucleus becomes stable by. . .

What is decaying?

Give two properties of radioactive subtsances.

What is a geiger counter and how does it work

What was Rutherford's alpha particle scattering experiment?

What were the results of this experiment?

What did the results show

Why was it accepted

what determines if a nucleus is unstable

Nuclei with atomic no above __ are radioactive

ALPHA

BETA

GAMMA

What is background radiation?

how to take background radiation into account

how to test different materials

How to test the range

Define ionization.

define irradiated

define contamination

how to avoid radiation

Define peer review

define activity

half life

count rate

count rate after N half lives