Question

Which of the following elements is highly reactive?

• A. K (Potassium)
• B. Ag (Argentum)
• C. Al (Aluminium)
• D. Au (Aurum)

Hint:

Alkali metals, like potassium, are among the most reactive elements due to their single electron in the outermost shell.

Answer 1

The Correct Option is A

Step 1: Understanding the reactivity.
Potassium (K) is a highly reactive element, particularly with water. It belongs to the alkali metals group, known for their high reactivity.

Step 2: Why other options are not highly reactive.
- (B) Ag (Argentum) is silver, which is less reactive compared to potassium.
- (C) Al (Aluminium) is reactive, but not as reactive as potassium.
- (D) Au (Aurum) is gold, known for its inert nature and low reactivity.

Final Answer: K (Potassium).