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Worksheets30.2 Nuclear Decay ม5
Total questions: 10
Worksheet time: 3mins
Name
Class
Date
1.
After the nucleus of a radioactive element undergoes changes, the element can transform into ...
a)
(a) a different isotope of the same element.
b)
(b) an entirely different element.
c)
Both (a) and (b)
d)
Neither (a) nor (b)
2.
During beta decay, a nucleus ....
a)
gives up two protons and two neutrons.
b)
maintains the same number of protons and neutrons.
c)
loses a proton and gains a neutron.
d)
gains a proton and loses a neutron.
3.
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.
4.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
5.
What type of decay is shown here
23892U ---> 23490Th + 42He.
a)
alpha
b)
beta
c)
gamma
6.
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
7.
Imagine you have 50,000 atoms of uranium-238. If U-238 has a half-life of 4.5 billion years, how many U-238 atoms will be left after 4.5 billion years?
a)
25,000
b)
50,000
c)
12,500
d)
0
8.
The process where one neutron hits a nuclei, which causes it to split releasing more neutrons which hit more nuclei causing more more neutrons to be released which hit more nuclei and so for and so on is called what?
a)
fusion
b)
hydrogen bomb
c)
chain reaction
d)
ionization
9.
The splitting of a nucleus into smaller nuclei is
a)
nuclear fusion
b)
nuclear fission
c)
half-life
d)
gamma radiation
10.
Two nuclei with low masses are combined to form one nucleus of larger mass is called what?
a)
Nuclear fission
b)
Nuclear fussion
c)
Nuclear half-life
d)
Half-life
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