electron configuration

Question

P-32^3-

Answer 1

 

[Ne]3s2 3p3 is P. The 32 represents 15 electron, 15 protons and 17 neutrons. For electron configuration, we concern ourselves only with electrons. In this case a total of 18 electrons. For when P gains 3 electrons to become P^3-, the configuration is [Ne]3s2 3P6