An isostere is

Adsorption isostere are

P_(4)S_(3) is isostructural and isosteric with

Among the species given below which one is isostere of N_2 ?

(1) Calculate the no. of electrons, protons & neutrons present in (i) ammonium iono (ii) phosphate ion. (2) Name a species which is isosteric with N_(2)O .

1eV = How much Joule? What do you understand by the term isostere?