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Radioactivity Study Guide

Total questions: 36

Worksheet time: 2hrs 37mins

Name
Class
Date
1.

In the equation, 146C --> 147N + 0-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.

a)

Gamma

b)

Beta

c)

Alpha

2.
If we start off with element 24X50 after an alpha decay we get another element Y that looks like
a)
22Y50
b)
22Y46
c)
20Y48
d)
26Y54
3.
Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.
a)
Alpha
b)
Beta
c)
Gamma
4.

24094Pu —› ____ + 42He

a)

23692U

b)

24796Cm

c)

24493Np

d)

24295Am

5.

Gamma rays have

a)

no mass

b)

a huge mass

c)

a small mass

d)

an average mass

6.

How is the alpha particle written in a nuclear equation?

a)

42He

b)

24He

c)

0-1e

d)

00γ

7.
A helium nucleus with two protons and two neutrons is called a(n) ____.  
a)
alpha particle
b)
electroscope
c)
beta particle
d)
gamma ray
8.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
9.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
10.
Solve this equation for beta decay.
614C = ___ + -10e
a)
410Be
b)
714N
c)
210He
d)
613C
11.

The nucleus is held together by the ___________________________force.

a)

The Strong Nuclear Force

b)

The Weak Nuclear Force

c)

Electromagnetism

d)

Gravity

12.
Has the symbol
a)
Alpha
b)
Beta 
c)
Gamma
13.
Has the symbol
a)
Alpha
b)
Beta
c)
Gamma
14.
Has the symbol
a)
Alpha
b)
Beta
c)
Gamma
15.
Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.
a)
Alpha
b)
Beta
c)
Gamma
16.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
17.

In a correctly written symbol what would be located in the "Z" position?

a)

number of neutrons

b)

atomic number

c)

number of electrons

d)

mass number

18.

This term refers to the amount of time it takes for half of a certain substance to undergo radioactive decay.

a)

alpha life

b)

beta life

c)

radioactivity time

d)

half-life

19.

What happens to an atom's mass when it undergoes beta decay?

a)

increases by 2

b)

increases by 4

c)

decreases by 2

d)

it does not change

20.

When an atom undergoes gamma ray radiation, its atomic number...

a)

increases by 1

b)

decreases by 1

c)

decreases by 2

d)

does not change

21.
Complete the nuclear equation and determine the type of decay that is occurring in this reaction. 
a)
alpha
b)
beta
c)
gamma
d)
none
22.
An isotope is an atom of an element with a different number of
a)
protons
b)
electrons
c)
neutrons
d)
pencils
23.

The % of the parent isotope remaining after 1 Half Life.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

24.

The % of the parent isotope remaining after 2 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

25.

What is the Half Life of this isotope?

a)

3 days

b)

5 days

c)

8 days

d)

10 days

26.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

27.
If one-fourth of the carbon-14 is remaining then how many half-lives have passed?
a)
1
b)
2
c)
3
d)
4
28.
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
a)
3.0g
b)
0.25mg
c)
0.3g
d)
0.25g
29.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
30.

The diagram shows 32 atoms.

16 of the Red are parent isotopes

16 of the Green are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

31.
When nuclei decay, massive amounts of __________ is released.
a)
energy
b)
jello
c)
protons
d)
neutrons
32.

finish the equation


18173Ta --> ____ + 18174W

a)

42He

b)

0-1e

c)

y

33.

finish the equation


22688Ra --> ____ + 22688Ra

a)

42He

b)

0-1e

c)

y

34.

Finish this equation

20983Bi--> _______ + 20581Tl

a)

42He

b)

0-1e

c)

y

35.

What type of nuclear decay is shown here

13756Ba →→ 13756Ba + γ rays

a)

alpha

b)

beta

c)

gamma

36.

If we start off with element 5024X after an gamma decay we get an element(product) that looks like...

a)

5124X

b)

5023X

c)

5024X

d)

5025X

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