1.
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What is the mass number of an iron atom that has 28 neutrons?
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2.
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Calculate the number of neutrons of 239Pu.
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3.
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What is the number of protons and the number of neutrons in the nucleus of 63Cu?
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4.
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What is the number of protons, neutrons, and electrons in 25Mg?
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5.
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What is the appropriate symbol for the isotope Z = 11, A = 23?
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6.
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What is the appropriate symbol for the isotope Z = 28, A = 64?
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7.
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What is the appropriate symbol for the isotope Z = 74, A = 186?
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8.
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What is the appropriate symbol for the isotope Z = 80, A = 201?
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