Chemistry, asked by student1906, 9 months ago

What does 4 and 2 represent

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Answered by Anonymous

1

Answer:

4 is atomic mass

Explanation:

2 is atomic number

Answered by ThinkingBoy

0

4 is the mass number (no. of protons + no. of neutrons)

2 is the atomic number (or number of protons) of helium

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