Question

calulate the number of neutrons in the following atoms ³¹ ¹⁵ P​

Answer 1

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• As the atomic number of P is 15 and atomic mass is 31. Therefore number of protons is 15 and the number of neutrons is (31-15) = 16. and number of electron = number of protons for a neutral atom.

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Answer 2

There are 31 and 15 so subtract 31 - 15 = 16