MCQ
The first ionisation potentials $(eV)$ of $Be$ and $B$ respectively are :-
- A$8.29\, eV, 9.32\, eV$
- B$9.32\, eV, 9.32\, eV$
- C$8.29\, eV, 8.29\, eV$
- ✓$9.32\, eV, 8.29\, eV$
✓
Answer
Correct option: D.
$9.32\, eV, 8.29\, eV$
d
The first ionization potentials $(e V)$ of $B e$ and $B$ respectively are $9.32,8,29 .$
The first ionization potentials $(e V)$ of $B e$ and $B$ respectively are $9.32,8,29 .$
According to theory as we move from lest to right in a period the ionization potential should increase but in case of $B e$ and $B$ Beryllium is having more ionization potential than Boran due to completely filled s orbital in Beryllium $\left(1 s^{2} 2 s^{2}\right)$.
Hence option D is correct.
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