What defines the mass number of an isotope?

2 answers:

6 0

Answer:

Explanation:

geniusboy [140]3 years ago

4 0

Answer:

Explanation:

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Luba_88 [7]

The answer is D. easier, higher

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Its C and D I believe

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Nina [5.8K]

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Sauron [17]

Answer:

is 23

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i got it rigjt .......

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kondaur [170]

Answer:

The atoms of some elements share electrons because this gives them a full valence shell just like the nobal gases GOOD LESSONS ♡

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