WorksheetsRadioactive Decay
Total questions: 32
Worksheet time: 22mins
Name
Class
Date
1.
A beta particle consists of fast moving electron & has a(n) __________ charge.
a)
Positive
b)
Negatuve
c)
Negative
2.
In the equation, 146C --> 147N + 0-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.
a)
Radioactive
b)
Beta
c)
Alpha
3.
What is a nuclear reaction?
a)
A type of equation that shows the atomic mass & mass number of the particles combined.
b)
A type of equation that shows the atomic number & mass number of the particles involved.
4.
Gamma radiation is usually emitted along with α-particles & β-particles.
a)
False
b)
True
5.
How is the alpha particle written in a nuclear equation?
a)
42He
b)
24He
6.
In the nuclear equation below, calculate the mass number of the alpha particle.
23892U-->23490Th + 42He + 200
23892U-->23490Th + 42He + 200
a)
238
b)
0
c)
234
d)
4
7.
Some substances spontaneously emitted radiation in a process called radioactivity.
a)
False
b)
True
8.
Radiation is when rays & particles are emitted by the radioactive material.
a)
True
b)
False
9.
What is a beta particle?
a)
An electron with a 1-charge.
b)
An electron with a 1+ charge.
10.
A reaction that involves a change in an atom's nucleus is called what?
a)
Nuclear Reaction
b)
Nuclear Equation
11.
High-energy radiation that possesses no mass & is denoted by the symbol λ is called ____________.
a)
Gamma Ray
b)
Gamma Pay
12.
Which of the following is a positively charged subatomic particle found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
13.
Which of the following is a subatomic particle with no charge that is found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
14.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
15.
Which of the following includes all of the subatomic particles found in the nucleus of an atom?
a)
Electrons and protons
b)
Electrons, protons, and neutrons
c)
Neutrons and electrons
d)
Protons and neutrons
16.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
17.
An atom has an atomic number of 30 and a mass number of 65. How many neutrons are in the atom?
a)
30
b)
65
c)
35
d)
95
18.
A particle that moves around the nucleus is a(n) .
a)
proton
b)
ion
c)
neutron
d)
electron
19.
The __________________ is the sum of the protons and the neutrons in an atom.
a)
Atomic Number
b)
Mass Number
c)
Protons
d)
Neutrons
20.
What is the Atomic Number?
a)
7
b)
6.941
c)
3
d)
6
21.
The atomic number of an element is the total number of _________.
a)
neutrons
b)
protons and neutrons
c)
electrons
d)
protons
22.
Isotopes of the same element have different ____________.
a)
numbers of protons
b)
numbers of electrons
c)
symbols
d)
numbers of neutrons
23.
During ______________, the atoms of one element break down to form atoms of another element.
a)
radioactive decay
b)
potassium decay
24.
__________________is the time it takes for half of the radioactive atoms in an element to decay.
a)
dating range
b)
half life
25.
What element makes up an alpha particle?
a)
oxygen
b)
helium
26.
Which one is NOT considered to be nuclear radiation?
a)
alpha particles
b)
beta particles
c)
quarks
27.
What machine is used to detect radiation?
a)
Geiger counter
b)
Richter counter
28.
What does this symbol represent (the red arrow)?
a)
beta particle
b)
alpha particle
c)
gamma rays
29.
What is the most penetrating radiation?
a)
gamma
b)
alpha
c)
beta
d)
positron
30.
Radiation can cause what?
a)
Superpowers
b)
Cancer
c)
Headaches
d)
The flu
31.
What is emitted during Alpha Radiation?
a)
A helium nuclei.
b)
A helium atom
c)
Gamma Rays.
d)
Positrons
32.
Alpha makes the atomic number decrease by how many?
a)
1
b)
2
c)
3
d)
5
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