1.

Explain the formation of covalent bonds iu oxygen molecule (O_(2)).

Answer»

Solution :The atomic number of oxygen is 8, so its electronic configuration is `{:(K,L),(2,6):}`
Thus, oxygen has SIX electrons in its L SHELL.
Therefore, it needs two more electrons to fill the L shell.
HENCE, two atoms of oxygen share two electrons of L shell to form a molecule of oxygen `(O_(2))`.
As a result, each ATOM of oxygen attains the electronic configuration of their nearest noble gas neon (Ne), which has eight electrons in their L shell.
These four valence electrons are depicted by dots or crosses is shown as follows :


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