Question

Question #9cad7

Answer 1

octet rule

Explanation:

Every atom has a valence shell (valence shell is outermost shell of an atom which takes part in a chemical reaction) . When valence shell tends to attain/gain 8 electrons in its valence shell(outermost shell) it is called or defined as octet rule. For example Chlorine which has 7 electrons in its outermost shell will gain one electron to complete its valence shell following octet rule.Hope this helps thanks

Answer 2

See explanation.....

Explanation:

It is defined as the tendency of an atom to fill its electron with `8` electrons (full shell).

This plays a vital role in elemental bonding and also the reaction of elements.If a element has full valence shell,then it is less reactive
i.e.The noble gases.The noble gases have full valence shell,So,they are very less reactive.