Question

1 g atom of nitrogen represent

Answer 1

Gram atomic mass is the mass, in grams, of one mole of atoms in a monatomic chemical element. It is numerically equal to the standard atomic weight (or atomic weight) in grams. The atomic mass of an element expressed in grams is called gram atomic mass.

Answer 2

1 gm atom of nitrogen is equal to 1 mole to nitrogen gas.
Or say ,
 
   1 gm-atom N2 = 1 mole N2 = 2 mole N = 28 gm N 

Hope that the conversions are sufficient for the problem u were facing 
CHEERS ^_^