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Each chlorine atom in a chlorine molecule needs to gain a share of electrons numbering:
ATwo
BFour
CFive
DOne
Answer & Solution
Correct answer: D. One
1. Chlorine has seven valence electrons.
2. An octet needs eight.
3. So it needs one more.
_Source: syllabus Science Class IX, Chapter 9, Atomic Foundations of Matter._
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