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What does the number at the end of an element mean? (For example, Hydrogen-3)

What does the number at the end of an element mean? (For example, Hydrogen-3)
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What does the number at the end of an element mean? (For example, Hydrogen-3)

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User Charmelle
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1 Answer

8 votes

Answer:

The top number is the total mass number, particles in an atom of an element that have mass are protons and neutrons.

Step-by-step explanation:

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User Friggle
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