AnswersPhysical ScienceTypes of Radioactive Decay

Types of Radioactive Decay — Quiz Answers

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1
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A scientist notices that a lump of niobium is warm to the touch and wonders if nuclear reactions are taking place in the metal. How can she find out?

A
Check for the presence of alpha, beta, and gamma particles.
B
Place the niobium in a pressurized container, and see if the lump becomes warmer.
C
Measure the metal’s temperature.
D
Look for the presence of niobium compounds.
2
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What is a key difference between chemical and nuclear reactions?

A
In chemical reactions, only alpha radiation is emitted. In nuclear reactions, alpha, beta, and gamma decay may occur.
B
Chemical reactions involve large changes in energy. Nuclear reactions absorb or release small amounts of energy.
C
Chemical reactions involve electron rearrangements. Nuclear reactions involve changes to the nucleus.
D
In chemical reactions, new compounds are formed. In nuclear reactions, compounds are destroyed.
4

How can a scientist assess whether a pure niobium Nb sample is responsible for contaminating the lab with radioactivity?

A
Place the niobium under pressure, and see if the level of radioactivity in the lab increases.
B
Heat the niobium, and see if the level of radioactivity in the lab increases.
C
Test the niobium sample for the presence of niobium oxide compounds.
D
Test the niobium sample to see whether it now contains other elements.
6

An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?

A
It donated neutrons to another atom in a chemical reaction.
B
It accepted radiation in a chemical reaction.
C
It emitted an alpha particle in a nuclear reaction.
D
It released a beta particle in a nuclear reaction.
9

What can form as a result of a chemical reaction?

A
compounds
B
alpha particles
C
isotopes
D
beta particles

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