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Chemical Bonding — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryChemical Bonding1 Mark
MCQ
Sodium has one electron in its outer shell and chlorine has 7 electrons in its outer shell. The atoms will form a __________ bond by __________ their electrons.
  • A
    Covalent, sharing
  • B
    Covalent, transferring
  • ✓
    Ionic, transferring
  • D
    Ionic, sharing
✓

Answer

Correct option: C.
Ionic, transferring
(c) Ionic, transferring
Explanation : Sodium has one electron in its outer shell (valence shell), and chlorine has 7 electrons in its outer shell (valence shell). Sodium will lose its one valence electron to become a positively charged ion ( $Na ^{+}$), while chlorine will gain that electron to become a negatively charged ion $\left( Cl ^{-}\right)$. The resulting electrostatic attraction between the oppositely charged ions forms the ionic bond between sodium and chlorine. Thus, to achieve a stable electron configuration these atoms will form an ionic bond by transferring electrons.

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