Question

a student states that nonmetal atoms form covalent bonds by gaining electrons until they have eight valence electrons. what is wrong with this statement?
a. nonmetal atoms do not usually form covalent bonds.
b. covalent bonds form when atoms share electrons.
c. nonmetal atoms form bonds until they have six valence electrons.
d. covalent bonds form between atoms that already have eight valence electrons.

Explanation:

Covalent bonds are formed when atoms share electrons. Non - metals typically form covalent bonds. The octet rule (having 8 valence electrons) is a common goal for many atoms when bonding. Option A is incorrect as non - metals do form covalent bonds. Option C is wrong because the goal is usually 8 valence electrons (octet rule). Option D is incorrect as atoms bond to achieve 8 valence electrons, not because they already have them.

Answer:

B. Covalent bonds form when atoms share electrons.