Find the number of protons, electrons and neutrons in (a) ._(13)^(27)A

1.	Find the number of protons, electrons and neutrons in (a) ._(13)^(27)Al^(3+) (b) ._(8)^(15)O^(2-)
Answer» SOLUTION :For `._(13)^(27)AL, Z = p = e^(-) = 13, A = 27, :. n = A - Z = 27 - 13 = 14, e^(-) " in " Al^(3+) = 13 - 3 = 10` For `._(8)^(15)O, Z = p = e^(-) = 8, A = 15:. n = A - Z = 15 - 8 = 7, e^(-) " in " O^(2-) = 8 + 2 = 10`

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