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Periodic Table, Periodic Properties and Variations of Properties — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryPeriodic Table, Periodic Properties and Variations of Properties1 Mark
MCQ
An element A belonging in Period 3 and Group II will have :
  • ✓
    3 shells and 2 valence electrons
  • B
    2 shells and 3 valence electrons
  • C
    3 shells and 3 valence electrons
  • D
    2 shells and 2 valence electrons
✓

Answer

Correct option: A.
3 shells and 2 valence electrons
(a) 3 shells and 2 valence electrons
Explanation : In the modern periodic table, horizontal columns are referred to as groups, and vertical rows are referred to as periods. The number of shells is indicated by the period number, while the number of valence electrons is shown by the group number. Hence, the element A has 3 shells and 2 valence electrons.

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