The hydride that is NOT electron deficient is:

Question

Canvas Classes · Accepted Answer

Electron deficient hydrides are those where the central atom has fewer electrons than needed for a complete octet:

-  (diborane): B has only 6 electrons → electron deficient ✗
- : Ga has only 6 electrons → electron deficient ✗
- : Al has only 6 electrons → electron deficient ✗
- : Si has 4 bonds × 2 electrons = 8 electrons → complete octet → NOT electron deficient ✓

Answer: Option (1) —

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