Quiz about Nuclear Reactions

Question 1

What makes something radioactive?

Accepted Answer

an unstable nucleus

Answer

elements with an atomic number above 81

Answer

contaminated sewage

Answer

It decays over time

Question 2

Has a mass of 4 and a charge of +2

Accepted Answer

Alpha

Answer

Beta

Answer

Gamma

Question 3

Takes two small nuclei and combines them into a larger nucleus

Accepted Answer

fusion

Answer

fission

Question 4

Which type of nuclear radiation is being emitted here?

Accepted Answer

beta

Answer

Alpha

Answer

gamma

Answer

none

Question 5

Which type of nuclear radiation is being emitted here?

Accepted Answer

alpha

Answer

beta

Answer

gamma

Answer

none

Question 6

What particle completes this reaction?

Accepted Answer

beta particle

Answer

alpha particle

Answer

gamma particle

Answer

neutron

Question 7

What makes a nucleus unstable?

Accepted Answer

the strong nuclear forces and electrostatic forces are unbalanced

Answer

if it has more protons than electrons

Answer

the bonds between the nucleus and the electrons are unbalanced

Answer

if the nucleus is too heavy

Question 8

When nuclei decay, massive amounts of __________ is released.

Accepted Answer

energy

Answer

electrons

Answer

protons

Answer

neutrons

Question 9

The force that holds neutrons and protons together in the nucleus is known as the:

Accepted Answer

strong nuclear force

Answer

weak nuclear force

Answer

hydrogen bonding

Answer

electronegative force

Question 10

You have 20 grams of uranium that has a half-life of 2 seconds, how much will be left after 4 seconds?

Accepted Answer

5 grams

Answer

2 seconds

Answer

6 grams

Answer

8 grams

Question 11

The time taken for half of an amount of radioactive atoms to decay.

Accepted Answer

Half-life

Answer

Nuclear fusion

Answer

Full-life

Answer

Dead time

Question 12

The three types of nuclear radiation in increasing order of penetrating power are ____.

Accepted Answer

alpha, beta, gamma

Answer

X ray, beta, gamma

Answer

alpha, gamma, beta

Answer

X ray, gamma, beta

Question 13

Which subatomic particles changes in an atom as a result of a nuclear reaction?

Accepted Answer

amount of protons and neutrons

Answer

amount of protons, neutrons, electrons

Answer

amount of protons and electrons

Answer

amount of electrons

Question 14

Which of the following types of radioactive decay only emits energy with no mass or charge?

Accepted Answer

Gamma

Answer

Alpha

Answer

Beta

Question 15

Which of the following is the most dangerous type of radiation?

Accepted Answer

Gamma

Answer

Alpha

Answer

Beta

Question 16

Nitrogen-16 has a half-life of 7.2 seconds. How much nitrogen-16 will remain in a 100 g sample in 21.6 seconds?

Accepted Answer

12.5 g

Answer

25 g

Answer

2 g

Answer

50 g

Question 17

The radioactive nucleus Rubidium (of mass number 87 and proton number 37) decays with the emission of a beta-particle. How many protons and neutrons are left in the nucleus?

Accepted Answer

protons = 38, neutrons = 49

Answer

protons = 37, neutrons = 49

Answer

protons = 37, neutrons = 50

Answer

protons = 38, neutrons = 87

Question 18

What happens to the atomic number during alpha decay?

Accepted Answer

The atomic number decreases by 2.

Answer

The atomic number decreases by 4

Answer

The atomic number increases by 1

Answer

The atomic number stays the same.

Question 19

How many parent atoms remain undecayed after 1 half-life?

Accepted Answer

10

Answer

20

Answer

5

Answer

15

Question 20

What is the half-life of the radioactive substance? (Click on image to make it larger).

Accepted Answer

5 years

Answer

50%

Answer

25%

Answer

10 years

Question 21

How much radioactive material is left after 10 years? (Click on image to make it larger).

Accepted Answer

25%

Answer

6.25%

Answer

50%

Answer

12.5%

Question 22

What is the half-life of mercury-203? (Click on image to make it larger).

Accepted Answer

50 days

Answer

50 years

Answer

50%

Answer

100 days

Question 23

What percent of mercury-203 remains after 2 half-lifes?

Accepted Answer

25

Answer

50

Answer

75

Answer

12.5

Question 24

How much time has passed if 75% of the mercury- 203 has decayed? (Click on image to make it larger).

Accepted Answer

100 days

Answer

50 days

Answer

150 days

Answer

200 days

Question 25

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

Accepted Answer

1.25mg

Answer

1.25g

Answer

10g

Answer

10mg

Question 26

A material that can stop alpha radiation is (Click on all that apply)

Accepted Answer

paper

Accepted Answer

lead

Accepted Answer

wood

Answer

air

Question 27

The least penetrating form of radiation is _____.

Accepted Answer

alpha

Answer

beta

Answer

gamma

Answer

UV

Question 28

What is the product of the alpha decay of Gold-175?

Accepted Answer

Ir-171

Answer

Tl-179

Answer

Au179

Answer

Au171

Question 29

Solve this equation for beta decay.
⁶⁰₂₇Co = ___ + ⁰_-1e

Accepted Answer

⁶⁰₂₈Ni

Answer

⁵⁶₂₅Mn

Answer

⁵⁸₂₃V

Answer

⁵⁹₂₇Co

Question 30

Solve this equation for alpha decay.
₈₅²⁰⁹At = ___ + ₂⁴He

Accepted Answer

₈₃²⁰⁵Bi

Answer

₈₆²⁰⁹Rn

Answer

₈₁²⁰⁷Tl

Answer

₈₅²⁰⁸At

Question 31

Gamma rays have

Accepted Answer

no mass

Answer

a huge mass

Answer

a small mass

Answer

an average mass

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