Question

Q3. Why are some elements chemically iner?​

Answer 1

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Elements react to attain stability by completing octet of electrons, for which they lose, gain or share electrons depending upon their valency. (e.g. Ne = 2,8), and hence are stable and do no need to lose/gain or share electrons, thus making them unreactive. ...

or

Lewis postulated that inert gas atoms are chemically inert because they hold 8 valence electrons. The valence electron pattern in these atoms is called an inert gas electron configuration. Chemists also call this a Lewis octet.

Answer 2

Answer:

Lewis postulated that inert gas atoms are chemically inert because they hold 8 valence electrons. The valence electron pattern in these atoms is called an inert gas electron configuration. Chemists also call this a Lewis octet.