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Alexus [3.1K]
3 years ago
12

This is the number of protons and neutrons i the nucleus of any atom

Chemistry
1 answer:
icang [17]3 years ago
4 0

Answer:

The mass number is defined as the total number of protons and neutrons in an atom. Consider Table below which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.

Explanation:

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