Which is an example of a covalent bond?
A. Chlorine accepts an electron from calcium to form a stable bond
B. Ions in a bar of pure iron are surrounded by a large number of valence electrons
C. Sodium gives an electron to chlorine to form a stable bond
D. There are less than 16 valence electrons in two chlorine atoms, but they form a stable bond

Question

Which is an example of a covalent bond?
A. Chlorine accepts an electron from calcium to form a stable bond
B. Ions in a bar of pure iron are surrounded by a large number of valence electrons
C. Sodium gives an electron to chlorine to form a stable bond
D. There are less than 16 valence electrons in two chlorine atoms, but they form a stable bond

anonymous · Answer

(D) There are less than 16 electrons... is the covalent bond in this set of answers.  (A) represents an ionic bond ("...accepts an electron...") (B) represents a metallic bond, and (C) represents another ionic bond (Sodium and Chlorine exchange an electron).  Helpful hint: molecules in one element are typically covalent bonds.