Question

Hydrogen does not posses the metallic character under normal conditions because

a) it has very low ionisation enthalpy

b) it has very low electron gain enthalpy

c) it has very high electron gain enthalpy

d) it has very high ionisation enthalpy​

Answer 1

Answer:

Although hydrogen has ns1 electron configuration just like alkali metals, it is still not a metal because it varies greatly from the alkali metals as it forms cations (H+) more reluctantly than other alkali metals.

Answer 2

It has very high ionisation enthalpy.

Metal:

• They have low ionisation energies.
• It indicates that they lose electrons in chemical processes.  
• Metal atoms have a comparatively low affinity for electrons within a complex.  

Hydrogen:

• It is a non-metallic element. It is the most prevalent element in the universe.
• The nucleus of hydrogen has only one orbital, which is strongly attracted to it. As a result, it is much smaller than alkali metals.  
• Thus it has a high ionisation enthalpy.