Worksheetsradioactivity lc1 COL
Total questions: 38
Worksheet time: 23mins
Name
Class
Date
1.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
2.
What type of radioactive decay is shown here?
a)
Alpha decay
b)
Beta decay
c)
Gamma decay
3.
Which type of radiation releases an electron?
a)
Alpha radiation
b)
Beta radiation
c)
gamma radiation
4.
What type of radiation can be stopped by clothing or a piece of paper?
a)
Alpha radiation
b)
Beta radiation
c)
gamma radiation
5.
What particle is released when an unstable isotope undergoes alpha radiation?
a)
an helium nucleus
b)
an electron
c)
a photon of light
6.
What type of radiation can be the most harmful?
a)
microwaves
b)
x-rays
c)
infrared
d)
visible
7.
Which process involves the splitting of large nuclei?
a)
alpha decay
b)
nuclear fusion
c)
beta decay
d)
nuclear fission
8.
What type of nuclear reaction occurs in the Sun?
a)
Nuclear fission
b)
beta decay
c)
alpha decay
d)
Nuclear fusion
9.
Which is NOT a characteristic of gamma radiation?
a)
High energized photon of light
b)
Can be stopped by a sheet of aluminum foil
c)
Is the most harmful type of radiation to humans
d)
Our use of protection is concrete, or several inches of lead
10.
What type of decay is shown here
a)
alpha decay
b)
beta decay
c)
gamma decay
11.
This particle determines what element you have - the elements identity.
a)
electron
b)
proton
c)
neutron
d)
valence shell
12.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
13.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
14.
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
a)
11
b)
5
c)
6
d)
16
15.
A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.
a)
more
b)
less
c)
identical
d)
small
16.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
17.
_______________ is the process by which unstable atoms emit radiation until they become stable.
a)
Radiation
b)
Chemical Reaction
c)
Radioactive Decay
d)
Isotopes
18.
In order of most to least penetrating radiation we have
a)
Alpha , Beta, Gamma
b)
Beta , Gamma , Alpha
c)
Gamma, Beta, Alpha
d)
Gamma, Alpha, Beta
19.
Negatively charged particles emitted from a nucleus at a high speed are ____ .
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
20.
Name the instrument used to detect radioactivity.
a)
voltmeter
b)
ohmeter
c)
seismograph
d)
geiger counter
21.
Which type(s) of radiation would be affected by a magnet?
a)
alpha only
b)
beta only
c)
alpha and beta
d)
gamma only
22.
Which type of radioactive decay is occurring in this equation?
a)
Alpha decay
b)
beta decay
c)
gamma decay
d)
positron emission
23.
Where does radioactivity have application in our lives?
a)
Medicine
b)
Energy (electricity)
c)
Agriculture
d)
All of the above
24.
The rate at which a radioactive element decays is its ____.
a)
quarter life
b)
whole life
c)
wonderful life
d)
half life
25.
In a nuclear reactor, electricity is produced from what element?
a)
Plutonium
b)
Uranium 235
c)
Radon 220
d)
Lead 232
26.
If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?
a)
200yrs
b)
100yrs
c)
50yrs
d)
300yrs
27.
A certain radioactive sample has a half life of 2 years. After 6 years, how much of the sample is left?
a)
1/2
b)
1/3
c)
1/16
d)
1/8
28.
Marie Curie was the first woman to win a...
a)
Golden Globe
b)
Nobel Prize
c)
Oscar
d)
Emmy Award
29.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
30.
After 4 half-lives, 1g of a sample of Krypton-85 remains unchanged. What was the original mass of the sample?
a)
16g
b)
32g
c)
0.0625g
d)
4g
31.
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
32.
Finish this equation
20983Bi--> _______ + 20581Tl
a)
42He
b)
0-1e
c)
y
33.
The most dangerous type of radiation is the ____.
a)
alpha particle
b)
gamma ray
c)
beta particle
d)
uranium
34.
Solve this equation for alpha decay.
85209At = ___ + 24He
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
35.
Identify the missing substance in each of the following nuclear reaction.
_____→13756 Ba + 0−1 e
a)
13755Ba
b)
13757La
c)
13856Ba
d)
13755Cs
36.
In the symbol 20682Pb what does 206 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of protons
37.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
38.
Solve this equation for beta decay.
2760Co = ___ + -10e
2760Co = ___ + -10e
a)
2556Mn
b)
2860Ni
c)
2358V
d)
2759Co
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