Question

In a period, ionisation energy of the extreme left and electronegativity of the extreme right element is respectively \underline{\hspace{1cm. (Don’t consider Noble gases).}

• A. Lowest/Highest
• B. Lowest/Lowest
• C. Highest/Lowest
• D. Highest/Highest

Answer 1

The Correct Option is A

Step 1: Ionisation Energy and Electronegativity.
In a period, as we move from left to right, the ionisation energy increases because the effective nuclear charge increases, making it more difficult to remove an electron. Therefore, the extreme left element will have the lowest ionisation energy. Step 2: Electronegativity.
Electronegativity increases across a period from left to right due to an increase in the nuclear charge and a decrease in atomic size, which makes the element more capable of attracting electrons. Therefore, the extreme right element will have the highest electronegativity. Step 3: Conclusion.
Thus, the correct answer is (A) Lowest/Highest.
Final Answer: (A) Lowest/Highest