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An atom is stable when its valence shell holds a full set of electrons called an:
AOctet
BOrbit
COffset
DOutlet
Answer & Solution
Correct answer: A. Octet
1. A full outer shell leaves nothing to gain or lose.
2. For most atoms that means eight electrons.
3. That full set is an octet.
_Source: syllabus Science Class IX, Chapter 9, Atomic Foundations of Matter._
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