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Physical Science Radioactivity
Test Description: Chapter 10 test review
Instructions: Answer all questions to get your test result.
1) Alpha Particles
A
are positively charged
B
can penetrate any thickness of matter
C
all of the above
D
consist of two protons and four neutrons
2) As beta particles ionize atoms, they____________
A
lose energy
B
gain energy
C
neither lose nor gain energy
D
none of the above
3) In the equation E=mc2,
A
the size of the particle
B
the speed of light
C
carbon
D
the total energy
4) Which of the following occurs in the nucleaus during alpha decay?
A
Two neutrons and two electrons are gained.
B
Two protons and two neutrons are gained.
C
Two protons and two neutrons are lost.
D
Two neutrons and two electrons are lost.
5) What changes in the nucleus during nuclear decay by gamma rays?
A
energy content
B
atomic number
C
atomic mass
D
all of the above
6) A sample of plutonium-239 decays to one-eighth of its original amount after 72360 years. What is its half-life?
A
36180 years
B
14470 years
C
72360 years
D
24120 years
7) What are the values of x and y in the following BETA decay - Cu --> Zn + e (you need to know atomic mass and atomic number of Cu and e-)
A
x=66, y=28
B
x=66, y=29
C
x=33, y=28
D
x=66, y=30
8) What are the values of x and y in the following ALPHA decay? Cm --> Pu + He (you need to know atomic mass and atomic number of Cm and He)
A
x=60, y=96
B
x=240 , y=96
C
x=236, y=94
D
x=244, y=94
9) Archeologists use the half-life of ____________ to date organic materials
A
carbon-12
B
carbon-14
C
uranium-238
D
uranium-235
10) What is non-ionizing, with mass but no charge?
A
alpha particle
B
beta particle
C
neutron emission
D
gamma ray
*select an answer for all questions
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