Physical Science

Chapter 18: Radioactivity and Nuclear Reactions

Section 2 Self-Check Quiz-Eng.

1.
Henri Becquerel discovered radioactivity when __________.
A)a radioactive salt exposed a photographic plate
B)a candy bar melted in his pocket
C)he sat in a full bathtub and the water overflowed
D)an apple dropped on his head
2.
Alpha particles contain __________.
A)two protons and two electrons
B)two electrons and two protons
C)two protons and two neutrons
D)two electrons and two neutrons
3.
Radioactivity can be harmful and cause disease because it affects __________.
A)air
B)water
C)cells
D)blood
4.
The process in which an atom loses radiation and becomes another element is known as __________.
A)transmutation
B)fission
C)fusion
D)chain reaction
5.
When a neutron turns into a proton in a nucleus, what sort of particle is emitted?
A)alpha
B)beta
C)gamma
D)photon
6.
Gamma particles __________.
A)have no mass and no charge
B)have mass but no charge
C)have no mass but have charge
D)have mass and charge
7.
A half-life is how long it takes for __________ to decay.
A)one half of the mass of a sample
B)one half of the volume of a sample
C)one half of the nuclei in a sample
D)one half of the radioactive particles in a sample
8.
Radioactive dating uses the half-life of different radioactive materials to test the __________ of a sample.
A)purity
B)age
C)radioactivity
D)nuclear stability
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