What do you expect the nature of hydrides is

hydrogen
cbse

#1

What do you expect the nature of hydrides is, if formed by elements of atomic numbers 15,
19, 23, 44 with dry dihydrogen? Compare their behaviour towards water.


#2

(a) Element with Z = 15, belongs to /(-block. It forms covalent hydride,
(b) Element with Z= 19 belongs to s-block. It forms ionic or saline hydride, KH.
© Element with Z= 23 belongs to d-block and Vth group elements. It forms interstitial hydride, . It is non-stoichiometric hydride.
(d) Element with Z—44 belongs to d-b\ocV and 8th group elements. It is ruthinium. It does not form any hydride because metals of group 7,8 and 9 do not form hydride (hydride gap)- Only ionic hydride, KH reacts violendy with water producing dihydrogen gas.

KH (s) + $H { 2 }O$(aq) ------>
KOH(aq) + ${ H }
{ 2 }$ (g)