AnswersSS - TX - Chemistry BUnit Test

Unit Test — Unit test Answers

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Which best describes nuclear fission?

A
A nucleus spontaneously splits and absorbs energy.
B
Two nuclei spontaneously combine and absorb energy.
C
A nucleus collides with a neutron and splits, releasing energy.
D
Nuclei combine to form a heavier nucleus, releasing energy.
22
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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
Measure the metal’s temperature.
B
Check for the presence of alpha, beta, and gamma particles.
C
Look for the presence of niobium compounds.
D
Place the niobium in a pressurized container, and see if the lump becomes warmer.
23

Which element is nuclear fusion least likely to produce?

A
hydrogen, which has an approximate mass of 1
B
chlorine, which has an approximate mass of 35
C
argon, which has an approximate mass of 39
D
silicon, which has an approximate mass of 28
24

Which type of reaction does this diagram represent?

Question illustration
A
nuclear fusion because nuclei combine to form a heavy nucleus
B
nuclear fission because an atom is splitting into two large fragments of comparable mass
C
nuclear fusion because a large amount of energy is being released
D
nuclear fission because the resulting products are not radioactive
25

A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide?

A
Superscript 32 subscript 17 upper P
Option A
B
Superscript 17 subscript 15 upper P.
Option B
C
Superscript 30 subscript 15 upper P.
Option C
D
Superscript 32 subscript 15 upper P.
Option D

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