Nuclear Pre-Quiz

Question 1
Two atoms that are isotopes of each other have the same number of protons, but a different number of neutrons.

True

False

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Question 2
Some nuclei are not stable.

True

False

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Question 3
Radioactive decay takes place when a nucleus spontaneously disintegrates.

True

False

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Question 4
All of the decay particles and energies are given off for every nuclear disintegration.

True

False

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Question 5
The types of radiation that are commonly discussed are:

alpha, theta, gamma

beta, phi, delta

delta, beta, phi

alpha, beta, gamma

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Question 6
Alpha radiation or α-particles are two protons and two neutrons that are bound together.

True

False

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Question 7
Alpha particles are very difficult to stop.

True

False

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Question 8
Alpha radiation is the emission of helium nuclei.

True

False

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Question 9
Beta radiation is usually composed of high energy, high speed electrons.

True

False

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Question 10
Beta-radiation can be high speed, high energy electrons.

True

False

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Question 11
Beta-radiation can be high energy positrons.

True

False

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Question 12
Beta-radiation is from the transformation of protons to neutrons.

True

False

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Question 13
Beta-radiation is very penetrating.

True

False

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Question 14
Beta-radiation has very small mass.

True

False

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Question 15
Gamma radiation or γ-rays are high energy light.

True

False

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Question 16
Gamma radiation can penetrate several feet of concrete.

True

False

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Question 17
The mass number is

the same as the atomic number.

the number of neutrons.

the number of protons plus the number of neutrons.

the mass shown on the periodic table.

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Question 18
Some radioactive materials decay very quickly.

True

False

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Question 19
One problem with nuclear power is that the radioactive materials decay very slowly.

True

False

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Question 20
The life of radioactive material is measured in

lightyears

half lifes

atomic units

None of the above.

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Question 21
After one half-life there will be half as many radioactive atoms.

True

False

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Question 22
If a sample starts with 1000 radioactive nuclei, how many will be left after three half-lives?

1000

500

125

None of the above.

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Question 23
Specific isotopes can be written using the chemical symbol and the mass number.

True

False

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Question 24
The symbol ⁶⁴Cu means that one of these copper atoms has

64 protons.

64 neutrons.

29 protons and 35 neutrons.

None of the above.

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Question 25
How many neutrons are in the nucleus of a ³⁵Cl atom?

35

17

18

None of the above.

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