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Hydrogen — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryHydrogen1 Mark
MCQ
The usual valency of hydrogen is:
  • A
    −2
  • B
    0
  • ✓
    +1 or sometimes −1
  • D
    +2
✓

Answer

Correct option: C.
+1 or sometimes −1
  1. +1 or sometimes −1
Explanation:
The electronic configuration of hydrogen is $1s^1$ as it has only one electron in its single orbital. So, it can gain one or lose one electron from its s orbital, thereby, showing +1 or −1 valency.

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