Question

Which element in group \(17\) has the highest electronegativity?

• A. \(\text{I}\)
• B. \(\text{Br}\)
• C. \(\text{Cl}\)
• D. \(\text{F}\)

Hint:

Electronegativity decreases down a group because atomic size increases.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Electronegativity is the tendency of an atom to attract a shared pair of electrons.

Step 2: Trend in a Group
Electronegativity decreases on moving down a group because atomic size increases and the shielding increases.

Step 3: Apply to Group 17
The order is \(\text{F}>\text{Cl}>\text{Br}>\text{I}\). Fluorine is at the top and is the smallest.

Step 4: Compare the options
The highest electronegativity belongs to \(\text{F}\), option (D).

Final Answer:
Fluorine has the highest electronegativity in group 17. \[ \boxed{\text{(D) }\text{F}} \]