To achieve a full outer shell of electrons nitrogen needs three bonds, in NH2 it would only have two.
Instead they form NH3
Ammonium chloride
H2 - hydrogen.
H2. Hydrogen gas.
NaCl + H2.
2Na + 2H2O -> H2 + 2NaOH
2Na + 2H2O -------> 2NaOH + H2
The chemical equation is not balanced. It should be balanced as follows: H2 + Cl2 → 2HCl
Sodium with HCl gives NaCl and H2 2Na + 2HCl -> 2NaCl + H2
The balanced chemical equation for H2 plus Br2 produces 2 HBr.
H2+ has a stronger bond than H2. The addition of a positive charge to the H2 molecule increases the attraction between the two hydrogen atoms, resulting in a stronger bond.
The reduction of NO2 to NH2 involves adding hydrogen gas in the presence of a metal catalyst such as platinum or palladium. The hydrogen gas reacts with the nitro group to form an intermediate compound, which then undergoes further reduction steps to yield the amino group. This process is commonly known as catalytic hydrogenation.
H2s+c2=