The hydride ions $({H^{-}})$ are isoelectronic with

The maximum sum of the number of neutrons and protons in an isotope of hydrogen is

In context with the industrial preparation of hydrogen from water gas $(CO + H_2)$,which of the following is the correct statement?

Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors,which one is most important in this respect?

What is the nature of the nuclear spin in para-hydrogen?

Write a note on covalent or molecular hydrides.