Question

write the most correct option of the following : (a) The element of highest valency - Na , Mg, Al. (b) The smallest atom - Li, Na , K. (c) The most electronegative element - N, O , F .(d) The least metallic element - Li, Be , B​

Answer 1

Answer:

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a) Aluminium (Al)

b) Lithium (Li)

c) Fluorine (F)

d) Boron (B)

Explanation:

Since Aluminium has valency 3, it is considered  to be having a high valency among the elements listed.

As atomic radius increases down a group, the smallest atom is lithium.

The most electronegative element is fluorine as electronegativity is showcased across a period.

The least metallic element is Boron since Group 1 and 2 Elements are highly metals. (Lithium and Berylium are Group 1 and 2 Elements)