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dmitriy555 [2]
3 years ago
11

Mass number of an elements is the sum of the number of...............and..............​

Health
2 answers:
leva [86]3 years ago
8 0

Answer:

Explanation:

The sum of the number of protons and neutrons in the nucleus is called the mass number of the isotope. The most common carbon atoms have six protons and six neutrons in their nuclei.

denis23 [38]3 years ago
7 0
Protons and neutrons
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