Which pair of atoms will form a covalent molecule?
A) One atom of copper and two atoms of fluorine
B) One atom of sodium and one atom of fluorine
C) One atom of oxygen and one atom of iron
D) One atom of oxygen and two atoms of hydrogen

Question

Which pair of atoms will form a covalent molecule?
A)	One atom of copper and two atoms of fluorine	
B)	One atom of sodium and one atom of fluorine	
C)	One atom of oxygen and one atom of iron	
D)	One atom of oxygen and two atoms of hydrogen

mww · Answer

Covalent means the bond is formed by the sharing of electrons between atoms, rather than one species donating electrons to another species to receive them (ionic bond).

Covalent bonding usually occurs between two non-metal elements where the electronegative difference is low.

matt6288 · Answer

which means D