In which of the following pairs, the ions are isoelectronic ?

1.	In which of the following pairs, the ions are isoelectronic ?
Answer» `Na^(+), MG^^(2+)` `Al^(3+), O^(-)` `Na^(+), O^(2-)` `N^(3), Cl^(-)` Solution :`Na^(+) = 11 -1 = 10 e^(-), Mg^(2+) = 12 -2 = 10 e^(-)`. THUS, they have same no. of electrons `Al^(3+) = 13 -3 = 10 e^(-), Q^(2-) = 8 + 2 = 10 e^(-)`. They have same no. of electrons `N^(3-) = 7 + 3 = 10 e^(-), Cl^(-) = 17 + 1 = 18 e^(-)`. They do not have same no. of electrons

Discussion