Question

'Hydride gap' is referred to which region of the periodic table ?

• A. $\text{Group 3, 4 and 5}$
• B. $\text{Group 5, 6 and 7}$
• C. $\text{Group 7, 8 and 9}$
• D. $\text{Group 3, 5 and 7}$

Answer 1

The correct option is C $\text{Group 7, 8 and 9}$

Metallic or Interstitial hydrides are formed by many d-block and f-block elements when heated with hydrogen under pressure. The hydrides tend to be non-stoichiometric and they may be of variable composition. There is a hydride gap where elements do not form hydrides.

Hence, the metals of 7th, 8th and 9th groups in the periodic table do not form hydrides and this region of periodic table is referred to as the hydride gap.