The electron affinity values are negative for:
A. Be → Be−
B. N → N−
C. O → O2−
D. Na → Na−
E. Al → Al−
Choose the most appropriate answer from the options given below:
A. Be → Be−
B. N → N−
C. O → O2−
D. Na → Na−
E. Al → Al−
Choose the most appropriate answer from the options given below:
- D and E only
- A, B, D and E only
- A and D only
- A, B and C only
The Correct Option is A
Solution and Explanation
The electron affinity values for each case are determined as follows:
(A) Be + e$^-$ $\to$ Be$^-$: Electron affinity is negative (E.A. = --ive).
(B) N + e$^-$ $\to$ N$^-$: Electron affinity is negative (E.A. = --ive).
(C) O + e$^-$ $\to$ O$^-$: Electron affinity is positive for O $\to$ O$^-$ (E.A. = +ive).
(D) Na + e$^-$ $\to$ Na$^-$: Electron affinity is positive (E.A. = +ive).
(E) Al + e$^-$ $\to$ Al$^-$: Electron affinity is positive (E.A. = +ive).
Thus, the correct answer is: A, B, and C only.
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