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Chemistry, 28.09.2020 21:01 christopherandp66l91

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What is the sum of all the protons and neutrons in an atom?

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Answer from: lagarde

Mass number.

Explanation:

The sum of the number of protons and neutrons in an atom is called the mass number.

For example: Carbon-12 has 12 protons and 12 neutrons.

- Sophia

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Answer from: Quest

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Answer from: Quest

so what is the problem with your lab report and whats the subject of the lab report? i will you

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