Question

Which of the following elements has highest electronegativity?

• A. $Li$
• B. $Na$
• C. $K$
• D. $Rb$

Hint:

Electronegativity decreases down a group and increases across a period.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks for the trend of electronegativity in Group 1 elements.

Step 3: Detailed Explanation:
Electronegativity decreases down a group because atomic size increases and nuclear attraction for shared electrons weakens.
Among the alkali metals:
Li (Top) \( \rightarrow \) Highest electronegativity.
Rb (Bottom) \( \rightarrow \) Lowest electronegativity.

Step 4: Final Answer:
Lithium (Li) has the highest electronegativity in the list.