Glencoe 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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