Science, asked by chin7rajanta7nya, 1 year ago

Why do some atomic weight differs from the sum of their atomic numberfor ex: Be=4atomic weight should be 4=4=8 but it is 9.012

Answers

Answered by NerdyPepper
1
Because of the presence of odd number of neutrons.
Ex: Be should have 4p and 4n = 8
      But it has 4p and 5n = 4+5 = 9 a.m.u
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