Please help I'm not sure what the answers are

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asked May 25, 2022 6.2k views

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Chikako · Answer 1 · 2022-05-31T01:18:06+0000

Answer:

An element's mass number (A) is the sum of the number of protons and the number of neutrons. The small contribution of mass from electrons is disregarded in calculating the mass number.

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