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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
The electronegativity of elements __________ across the period and __________ down the group.
  • A
    Increases, increases
  • B
    Decreases; increases
  • ✓
    Increases; decreases
  • D
    Decreases, decreases
✓

Answer

Correct option: C.
Increases; decreases
(c) Increases; decreases
Explanation :Electronegativity is the tendency of an element to attract the shared pair of electrons towards itself in a covalently bonded compound. Across a period, atomic size decreases and nuclear pull increases. Hence, electronegativity increases. On moving down a group, atomic size increases and nuclear pull decreases. Hence, electronegativity decreases.

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