1(xiv)
Sodium is in Group I of the Periodic Table and chlorine is in Group VII. Which statement correctly describes what happens when sodium bonds ionically with chlorine?
- (a)Sodium atom gains an electron to form Na- and chlorine atom loses an electron to form Cl+
- (b)Sodium atom gains an electron to form Na+ and chlorine atom loses an electron to form Cl-
- (c)Sodium atom loses an electron to form Na- and chlorine atom gains an electron to form Cl+
- (d)Sodium atom loses an electron to form Na+ and chlorine atom gains an electron to form Cl-
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Sodium atom loses an electron to form Na+ and chlorine atom gains an electron to form Cl-
Reason — Sodium has one valence electron which it loses to attain a stable octet, forming Na+. Chlorine has seven valence electrons and gains one electron to complete its octet, forming Cl-. These oppositely charged ions are held together by an ionic bond.