I need to know how to do this but if you could just answer it it's fine​

im not entirely sure what needs to be done but the 2NH3 is the product and the other half is the reactants .

if any elements are added to others it is the reactants

this is a breakdown of a compound because the arrow always indicates the direction of the reaction .

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8