Question

Which of these hydrides is electron deficient? magnesium hydride beryllium hydride aluminium hydride All of the above

Answer 1

Thanks for asking the question.
Beryllium hydride is electron deficient among these. It is because it has only 2 electrons in its valence shell (four in total) and it uses these two to form bonds with hydrogen but it does not obey the octet rule that is eight electrons in the valence shell. So it is regarded as deficient in electrons where as the others follow the octet rule.
Hope it helps.

Answer 2

Answer:

SiH4Explanation:It has complete octet hence it is not a electron deficient hydride