Basic Physics of Nuclear Medicine/A&Nmcq

{Electrons are positioned: - inside the nucleus + outside the nucleus - both inside and outside the nucleus - at all of the above locations
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 * Correct Answer - see Atomic Structure.

{Mass Number is defined as: + the number of protons plus the number of neutrons in a nucleus - the number of neutrons in a nucleus - the complement of the Atomic Number - the number of protons in a nucleus
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 * Correct Answer - see Classification of Nuclei.

{An atom can be considered as consisting mostly of: - isotopes + empty space - water - neutrons
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 * Correct Answer - see Atomic Structure.

{The number of known isotopes is roughly: - 5,000 + 2,500 - 1,000 - 100
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 * Correct Answer - see Radioactivity

{Atomic Number is defined as: - the inverse of the Mass Number - the number of protons plus the number of neutrons in a nucleus + the number of protons in a nucleus - the number of neutrons in a nucleus {The radius of a nucleus is how much smaller than that of an atom: - 10 times - 100 times - 1,000 times + 10,000 times {For an atom to be electrically neutral, the number of: + protons equals the number of electrons - neutrons equals the number of electrons - protons equals the number of neutrons - protons equals the number of nucleons {Nuclear binding energies are usually expressed in units of: - keV + MeV - joules - eV {The Hydrogen-3 nucleus (also called Tritium) consists of: + two neutrons and one proton - two protons and one neutron - two neutrons and two protons - two neutrons and no protons {Isotopes are nuclei with: - same A and Z + same Z, different A - same A, different Z - Z greater than A {Radioactivity is the process of: + an unstable nucleus becoming stable - an electron moving to a higher energy shell - an electron moving to a lower energy shell - a stable nucleus becoming unstable {The number of protons in a nucleus is expressed by the symbol: - A + Z - X - M {How many neutrons are in a Uranium-235 nucleus? - 235 - 146 - 92 + 143 {The two main parts of an atom are called: - nucleus and protons - atom and molecule - molecule and electron + none of the above
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 * Correct Answer - see Classification of Nuclei.
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 * Correct Answer - see Atomic Structure.
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 * Correct Answer - see The Nucleus.
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 * Correct Answer - see Binding Energy.
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 * Correct Answer - see Classification of Nuclei.
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 * Correct Answer - see Classification of Nuclei.
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 * Correct Answer - see Nuclear Stability.
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 * Correct Answer - see Classification of Nuclei.
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 * Correct Answer - see Classification of Nuclei.
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 * Correct Answer - see Atomic Structure.

{Which of the following is the smallest? - a molecule - an atom - a nucleus + an electron
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 * Correct Answer - see Atomic Structure.

{Which one of the following is a nucleon? + proton - electron - nucleus - molecule {One Atomic Mass Unit is about: - one millionth of a gram - one million, millionth of a gram - one million, million, millionth of a gram + one million, million, million, millionth of a gram {In the symbol Cs-137, the number 137 represents: + the mass number - the number of electrons - the atomic number - Avagadro's number
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 * Correct Answer - see Atomic Structure.
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 * Correct Answer - see Atomic Mass Unit.
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 * Correct Answer - see Classification of Nuclei.