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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
Valency of aluminium is :
  • A
    2
  • ✓
    3
  • C
    4
  • D
    5
✓

Answer

Correct option: B.
3
(b) 3
Explanation : Atomic number of aluminium is 13. So its electronic configuration is 2, 8, 3. Since it has 3 electrons in its valence shell, it will lose 3 electrons to complete its octet hence its valency is +3.

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