Question

What do the following denote?

(i) $N$

(ii) $2N$

(iii) $N_2$

(iv) $2N_2$

Answer 1

(i). N denotes one 1 atom of element nitrogen.
.(ii)2N denotes two nitrogen atoms.
(iii) N₂ denotes one mole nitrogen gas.
(iv) 2N₂ denotes 2 moles of nitrogen gas