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Why are some molecules diatomic?

Answer 1

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

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...

#dotH + dotH rarr H-H+Delta#

All elemental gases (well the ones with any chemistry) are also diatomic...#H_2, Li_2, C_2, N_2, O_2, X_2#...the elements are thermodynamically MORE stable as the diatom...

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Answer 2

Kai Bowman

Certain molecules are diatomic due to the fact that they are made up of two atoms of the same element that share electrons in order to form a stable electron configuration.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.