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2. Cell Chemistry & Cell Components - Part 1 of 4

2. Cell Chemistry & Cell Components / Atoms- Smallest Unit of Matter / Problem 1

Which of the following statements about the mass number of an atom is not true?

A

It includes the number of protons.

B

It includes the number of neutrons.

C

It includes the number of electrons.

D

It is expressed as a whole number.

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