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Nuclear Decay Equations

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

The three main types of nuclear radiation are alpha, beta, and gamma. Which of the following lists these types of radiation from highest penetrating power to lowest penetrating power?

a)

alpha, gamma, beta

b)

beta, alpha, gamma

c)

beta, gamma, alpha

d)

gamma, beta, alpha

2.

Which equation correctly represents the alpha decay of polonium-214?

a)

A

b)

B

c)

C

d)

D

3.

This equation shows the radioactive decay of thorium (Th). Which of the following particles is released in this reaction?

a)

alpha

b)

beta

c)

neutron

d)

gamma

4.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
5.
Complete the nuclear equation and determine the type of decay that is occurring in this reaction. 
a)
alpha
b)
beta
c)
gamma
d)
none
6.
Solve this equation for alpha decay.
20985At = ___ + 42He
a)
20583Bi
b)
20986Rn
c)
20781Tl
d)
20885At
7.
Solve this equation for beta decay.
6027Co = ___ + 0-1e
a)
5625Mn
b)
6028Ni
c)
5823V
d)
5927Co
8.
If we start off with element 5024X after an alpha decay we get another element Y that looks like
a)
5022Y
b)
4622Y
c)
4820Y
d)
5426Y
9.
What is the missing isotope that will balance the following nuclear equation?
94Be  +  11H →  _____  +  42He
a)
105B
b)
105Ne
c)
63Li
d)
63C
10.

Complete the nuclear reaction

a)

42He

b)

0-1 e

c)

00Y

d)

178O

11.
A helium nucleus with two protons and two neutrons is called a(n) ____.  
a)
alpha particle
b)
electroscope
c)
beta particle
d)
gamma ray
12.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
13.
When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....
a)
remains the same
b)
  decreases by one.
c)
increases by one.
d)
increases by two.
14.
Radioactive materials have unstable...
a)
electrons
b)
protons
c)
nuclei
d)
neutrons
15.
What is the product of the alpha decay of Gold-175?
a)
Ir-171
b)
Tl-179
c)
Au179
d)
Au171
16.
What happens to the atomic number during alpha decay?
a)
The atomic number decreases by 4
b)
The atomic number increases by 1
c)
The atomic number decreases by 2.
d)
The atomic number stays the same.
17.

What does the 4 in He-4 represent?

a)

the mass number

b)

the atomic number

c)

the number of protons

d)

the number of neutrons

18.

Np-239 emits a beta particle. What element is the other product?

a)

Th-239

b)

U-239

c)

Pu-239

d)

Pu-238

19.

The spontaneous disintegration of a nucleus into a slightly lighter and more stable nucleus, accompanied by emission of particles, electromagnetic radiation, or both, is

a)

nuclear fusion

b)

nuclear fission

c)

radioactive decay

d)

nuclear decay

20.
What element is the ?
a)
Ag-115
b)
Cd-115
c)
Pd-115
d)
Not Listed
21.
If Gadolinium-150 goes through alpha decay, the resulting element has a new atomic mass of _____.
a)
150
b)
148
c)
146
22.

In the symbol 20682Pb what does 82 stand for?

a)

Mass number

b)

Atomic number

c)

Atomic mass

d)

Number of protons

23.
If Thorium-234 undergoes a beta decay, What element will be left in its place?
a)
Actinium-234
b)
Thorium-233
c)
Protactinium-234
d)
Radium-230
24.
If a sample decays via beta radiation how does its mass change?  
a)
4
b)
2
c)
1
d)
0
25.

What is false of the penetrance of different types of radiation?

a)

Alpha blocked by paper

b)

Beta blocked by aluminum

c)

Beta blocked by paper

d)

Gamma blocked by lead

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