Question

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

A

Its tendency to lose an electron to form a cation

B

It tendency to gain a single electron in its valence shell to attain stable electronic configuration

C

Its low negative electron gain enthalpy value

D

Its small size

Medium

Solution

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Correct option is B)

Hydrogen resembles halogens as it has similar tendency to gain a single electron to attain stable noble gas configuration. The electronic configuration of hydrogen is . It needs one more electron to attain stable electronic configuration of hellium, a noble gas. The electronic configuration of halogen is . It needs one more electron to attain stable electronic configuration of a noble gas.

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