How big is the nucleus of an atom?
A) about 1% of the volume of the whole atom
B) about a millionth of the volume of the whole atom
C) about a billionth of the volume of the whole atom
D) about a trillionth of the volume of the whole atom
Correct Answer:
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Q39: Magnetic confinement is used in controlled fusion
Q40: Carbon-14 dating can be used to find
Q41: The expression(s)indicating the number of protons in
Q42: After three half-lives,3/4 of the nuclei in
Q43: An alpha particle is like 
Q45: What's an isotope?
A)a radioactive material
B)an atom of
Q46: An alpha particle is another name for
Q47: Why is nuclear reactor waste radioactive?
A)Radiation from
Q48: A gamma ray is another name for
Q49: What holds the nucleus together?
A)electrical forces between
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