All the elements in one group of the table share the same number of:
ANeutron numbers
BNuclear charges
CValence electrons
DOccupied shells
Answer & Solution
Correct answer: C. Valence electrons
1. Group members behave alike chemically.
2. Their outermost shells match.
3. So they share valence electrons.
_Source: syllabus Science Class X, Chapter 5, Periodic Classification of Elements._
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