Question

Electronegativity of chlorine is less than oxygen because:

• A. Oxygen has larger size than chlorine
• B. Oxygen has smaller size and more effective nuclear charge
• C. Chlorine has higher nuclear charge
• D. Both have same electronegativity

Hint:

In general, electronegativity increases as atomic size decreases and nuclear charge increases. Oxygen is more electronegative than chlorine due to its smaller size and stronger nuclear charge.