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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?
  1. It tendency to gain a single electron in its valence shell to attain stable electronic configuration
  2. Its low negative electron gain enthalpy value
  3. Its tendency to lose an electron to form a cation
  4. Its small size

A
Its low negative electron gain enthalpy value
B
Its small size
C
Its tendency to lose an electron to form a cation
D
It tendency to gain a single electron in its valence shell to attain stable electronic configuration
Solution
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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 1s1. It needs one more electron to attain stable electronic configuration of hellium, a noble gas. The electronic configuration of halogen is ns2np5. It needs one more electron to attain stable electronic configuration of a noble gas.

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Q1

Question 1

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

(a) Its tendency to lose an electron to form a cation

(b) Its tendency to gain a single electron in its valence shell to attain stable electronic configuration

(c) Its low negative electron enthalpy value

(d) Its small size

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