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The sum of the numbers of neutrons and protons is the
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The mass number of an atom is the total number of protons and neutrons in the nucleus of an atom. It is represented by the symbol 'A'. Show more…
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The _________ number represents the sum of the number of protons and neutrons in a nucleus.
What are the number of protons and the number of neutrons in each of the following isotopes? ${ }^{18} \mathrm{~F},{ }^{25} \mathrm{Na},{ }^{51} \mathrm{~V},{ }^{84} \mathrm{Kr},{ }^{120} \mathrm{Te},{ }^{148} \mathrm{Dy},{ }^{175} \mathrm{~W},$ and ${ }^{222} \mathrm{Rn}$.
The atomic number of an element a. equals the number of neutrons in an atom. $b$. equals the number of protons in an atom. c. equals the number of protons minus the number of neutrons d. equals the number of neutrons plus the number of protons. $e .$ depends on the isotope.
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