Hydrogen has valency 1 because its atom has
A0 electrons in its only shell
B2 electrons in its only shell
C8 electrons in its outer shell
D1 electron in its only shell
Answer & Solution
Correct answer: D. 1 electron in its only shell
1. Hydrogen's atomic number is 1.
2. Its electron arrangement is just 1.
3. It can share or lose this one electron to form bonds.
4. Hence the valency of hydrogen is 1.
_Source: Selina Concise Chemistry Class 8, Ch on Hydrogen (Mistral OCR'd PDF), section on atomic data_
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