alleryStart learning →Hydrogen does not obey the octet rule. How many electrons fill its valence shell?
AFour electrons
BSix electrons
CTwo electrons
DEight electrons
Answer & Solution
Correct answer: C. Two electrons
1. The octet rule describes main group atoms reaching eight valence electrons.
2. Hydrogen has only one shell available, and that shell holds two electrons at most.
3. Two electrons therefore fill hydrogen completely, which is why it sits outside the octet rule.
_Source: OpenStax Chemistry (CC BY 4.0), Chs 7 and 17, section 7.3 Lewis Symbols and Structures_
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