Question

The correct order of the metallic character of the elements Be, Al, Na, K is:

• A. \( \text{K}>\text{Na}>\text{Al}>\text{Be} \)
• B. \( \text{K}>\text{Al}>\text{Na}>\text{Be} \)
• C. \( \text{Al}>\text{K}>\text{Na}>\text{Be} \)
• D. \( \text{Na}>\text{K}>\text{Be}>\text{Al} \)

Hint:

Down the group \( \rightarrow \) metallic character increases. Across a period \( \rightarrow \) it decreases.

Answer 1

The Correct Option is A

Metallic character increases down the group and decreases across the period.
K and Na are alkali metals \( \rightarrow \) very metallic; Al is a post-transition metal; Be is least metallic among them.
Hence the order is: \( \text{K}>\text{Na}>\text{Al}>\text{Be} \)