Question

Why thermal stability of hydrides of group 15 element decreases from NH3 to BiH3?

Answer 1

Answer:

The stability of hydrides decreases down the group from NH3 to BiH3. This is due to a decrease in their bond dissociation enthalpy. ... Hence the bond dissociation energy decreases down the group due to the increase in the size of the central atom.

Answer 2

Answer:

The stability of hydrides decreases down the group from NH3 to BiH3. This is due to a decrease in their bond dissociation enthalpy. ... Hence the bond dissociation energy decreases down the group due to the increase in the size of the central atom.

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