Asked by Anonymous
the number of neutrons in the nucleus of an atom of 9Be 4 under 9
Answers
Answered by
Dr Russ
I take it is Be, with mass number =9 and therefore atomic number =4.
Atomic number = number of protons =4
Mass number = number of protons+ number of neutrons = 9
so number of neutrons = 9-4=5
Atomic number = number of protons =4
Mass number = number of protons+ number of neutrons = 9
so number of neutrons = 9-4=5
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