a
In the atomic notation zX, the letter A represents:
4.
a.
The number of electrons in the atom.
b.
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
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
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