Question

all the mass of an atom is concentrated in the nucleus. give scientific small reson

Answer 1

Because the mass of electron is negligible
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Answer 2

hey mate

here is ur answer

as u know proton is present inside the nucleus and the mass of electron is much smaller than proton.

It means that mass of electron is negligible in comparison to proton.

hence we can say the atomic mass is concentrated in nucleus.

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