Chemistry
An element A belonging to period 3 and group II will have :
- 3 shells and 2 valence electrons
- 2 shells and 3 valence electrons
- 3 shells and 3 valence electrons
- 2 shells and 2 valence electrons
Periodic Table
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Answer
3 shells and 2 valence electrons
Reason — The number of shells present in an atom determines its period and valence electrons determine its group.
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