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Definition of mass number​
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28 votes
Definition of mass number​

User PingZing
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2 Answers

14 votes
14 votes

Answer:

The total number of protons and neutrons in a nucleus.

Step-by-step explanation:

I memorized it.

User Shreya Batra
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7 votes
7 votes

Answer:

Mass number of an atom is defined as the sum of the number of protons and number of neutrons.

User Feelsbadman
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