Question

Arrange the following elements in increasing order of their metallic character:
Li, F, K, S, Al

• A. F < S < K < Al < Li
• B. F < S < Al < Li < K
• C. F < Al < S < Li < K
• D. F < S < Al < K < Li

Answer 1

The correct option is B F < S < Al < Li < K

Alkali elements, in this case, K and Li, are the most metallic in their respective periods.
Metallic character increases down the same group and decreases along a period.
So,
$\bullet$ K is more metallic than Li.
$\bullet$ F is the least metallic element in the periodic table.
$\bullet$Al is more metallic than S, that, in turn, is more metallic than F
So the trend is F < S < Al < Li < K.