Give physical and chemical properties of dinitrogen.

(N/A) Physical properties: Dinitrogen is a colourless,odourless,tasteless,and non-toxic gas. The nitrogen atom has two stable isotopes: ${}^{14}N$ and ${}^{15}N$.
Water solubility is very low ($23.2 \ cm^{3}$ per litre of water at $273 \ K$ and $1 \ bar$ pressure) and it has low freezing and boiling points.
Chemical properties: It is inert at room temperature because of high $N \equiv N$ bond enthalpy; reactivity increases with a rise in temperature.
At high temperatures,it directly combines with some metals to form predominantly ionic nitrides and with non-metals to form covalent nitrides.
For example:
$6Li + N_{2} \xrightarrow{\Delta} 2Li_{3}N$
$3Mg + N_{2} \xrightarrow{\Delta} Mg_{3}N_{2}$
It combines with hydrogen at about $773 \ K$ in the presence of a catalyst to form ammonia.
Dinitrogen combines with dioxygen only at very high temperatures (about $2000 \ K$) to form nitric oxide $(NO)$:
$N_{2(g)} + O_{2(g)} \xrightarrow{2000 \ K} 2NO_{(g)}$