a
In the atomic notation zX, the letter A represents:
4.
a.
The number of electrons in the atom.
b.
The number of neutrons in the atom.
c.
The number of protons in the atom.
d.
The number of protons plus neutrons in the atom.
5.
Naturally-occurring radioactive materials produce
and
radiations.
a.
Alpha, beta, neutron.
b.
Alpha, beta, gamma.
c.
Proton, alpha, gamma.
d.
Beta, gamma, neutron.
6.
The radiation with the greatest penetrating ability is:
a.
Beta.
b.
Alpha.
c.
Neutrons.
d.
Gamma rays.
7.
In beta decay, the atomic mass number:
a.
Increases by one.
b.
Stays the same.
c.
Decreases by one.
d.
Decreases by four.
MD0180
1-28
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