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The total mass of an atom expressed in atomic mass units is known as the * mass number. atomic number. isotopic number. covalent number.
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The total mass of an atom expressed in atomic mass units is known as the *

mass number.
atomic number.
isotopic number.
covalent number.

User Ewan Todd
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11 votes

Answer:

c

Step-by-step explanation:

User Amit Pal
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