MCQ
$\ce{AlH_3}$ is an example for:
- Ainterstitial hydride
- Belectron rich hydride
- Cionic hydride
- ✓electron deficient hydride
✓
Answer
Correct option: D.
electron deficient hydride
According to the Bohr's octet rule, each element tends to completely fill its outermost orbit with $8$ electrons in it. Electronic configuration of aluminium is $2, 8, 3$ that means it still needs $5$ more electrons to complete its octet. That's why aluminium is electron deficient.
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