# Why are some molecules diatomic?

Jun 1, 2018

To a first approximation all elements are diatomic....

#### Explanation:

How so? Well, because hydrogen is by far the most abundant element in the universe as far as we know...and commonly hydrogen appears as the ${H}_{2}$ molecule...

And this occurrence owes to thermodynamic stability...the formation of hydrogen-hydrogen bonds is exothermic...

$\dot{H} + \dot{H} \rightarrow H - H + \Delta$

All elemental gases (well the ones with any chemistry) are also diatomic...${H}_{2} , L {i}_{2} , {C}_{2} , {N}_{2} , {O}_{2} , {X}_{2}$...the elements are thermodynamically MORE stable as the diatom...