Question

Atomic number and mass numbers : about
speedly and answer​

Answer 1

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Atomic number of hydrogen is 1 and mass is 2

Answer 2

Answer:

The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element

The complete amount in the protons and neutrons in the nucleus of an atom. For example, nitrogen has seven protons in its nucleus and seven neutrons, supplying it with 14 masses.