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Regents Chemistry Unit 4
Test Description: The is a review of Unit 4, the nucleus
Instructions: Answer all questions to get your test result.
1) What is the charge of a proton?
A
Positive
B
Negative
C
Neutral
D
Infinite
2) What is the charge of an electron?
A
Infinite
B
Positive
C
Neutral
D
Negative
3) What is the mass of a proton?
A
1
B
-1
C
2
D
0
4) What is the mass of a neutron?
A
1
B
0
C
-1
D
2
5) What is the mass of an electron?
A
3
B
1
C
1/1836th of a proton
D
2
6) The atomic mass number of an atom is
A
Neutrons minus protons
B
Electrons plus protons
C
Protons plus neutrons
D
Electrons times electrons
7) Nuclear charge is the same as the number of
A
Neutrons
B
Klingons
C
Protons
D
Nucleons
8) Isotopes of an element have the same number of protons, but a different number of
A
Positrons
B
Neutrons
C
Isotrons
D
Electrons
9) Atoms of what atomic number tend to be more radioactive than atoms below it?
A
12
B
24
C
48
D
83
10) Which radioactive decay particle has the same mass and charge as a helium atom?
A
Beta
B
Alpha
C
Positron
D
Gamma
11) What is the most powerful and harmful form of radioactive decay?
A
Beta
B
Positron
C
Gamma
D
Alpha
12) Which of the following is NOT an acceptable method of testing for radioactivity?
A
Bring it near some phosphorescent materials
B
Use it to expose protected photographic film
C
Test it with a Geiger counter
D
Expose yourself to it and see if you have health problems
13) Which term is best described as the period of time that must go by for half of the nuclei in the sample to undergo decay?
A
Periodicity
B
Decay time
C
Half-life
D
Radioactive sensitivity
14) Which radioactive isotope is used to detect and cure hyperthyroidism?
A
C-14
B
U-235
C
I-131
D
Co-60
15) Which radioactive isotope is used as a source of radiation to treat cancer?
A
Co-60
B
U-235
C
I-131
D
C-14
16) Which radioactive isotope is used in the dating of biological remains, such as in the field of archaeology?
A
Co-60
B
U-235
C
C-14
D
I-131
17) Which type of reaction releases more energy?
A
Nuclear Fusion
B
Light a match
C
Burning of fossil fuels
D
Nuclear Fission
18) Which type of reaction involves fusing together two small atoms to release tremendous amount of energy?
A
Nuclear Fusion
B
Nuclear Fission
C
Lighting a match
D
Burning of fossil fuels
19) Which type of reaction involves taking a large nuclei and splitting into smaller ones, destroying a tiny bit of mass and releasing vast amounts of energy?
A
Lighting a match
B
Nuclear Fission
C
Burning of fossil fuels
D
Nuclear Fusion
*select an answer for all questions
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