Question

The number of electrons gained by non-metal element is equal to its

• A. valency
• B. group number
• C. bond length
• D. All of these

Answer 1

The Correct Option is A

Valency is the ability of an atom to bond with other atoms, which is determined by the number of electrons in its outermost shell. Non-metals, which are typically found on the right side of the periodic table, tend to gain electrons to achieve a stable electron configuration, often aiming for a full outer shell, similar to that of noble gases.

In other words, the valency of a non-metal element corresponds to the number of electrons it needs to gain to complete its outer shell. This is why the number of electrons gained by a non-metal element is equal to its valency. Among the options provided, 'valency' is the correct answer.

Answer 2

Correct answer: valency 

Explanation:
Non-metals tend to gain electrons in order to complete their outermost shell (usually to achieve a stable octet). The number of electrons a non-metal gains during chemical bonding is equal to its valency.

🔹 For example, oxygen (\(O\)) has 6 electrons in its outer shell and needs 2 more to complete the octet. So, its valency is 2.
🔹 Similarly, chlorine (\(Cl\)) has 7 valence electrons and needs 1 more, so its valency is 1.

Therefore, the number of electrons gained by a non-metal element is equal to its valency.