Which statement about covalent compounds is FALSE? Covalent compounds can contain as little as
a 2 atoms or as many as several thousand
atoms.
b
Covalent compounds can contain a maximum
of 4 different atoms.
C
Covalent compounds are held together by
covalent bonds.
d Covalent compounds contain only nonmetals.

b . Covalent compounds can contain a maximum  of 4 different atoms.

Explanation:

The covalent compounds are those compounds that are formed between the non-metals via sharing of electrons. The bonds so formed between these non-metallic atoms are covalent. There can be two or several different kinds of atoms that can form covalent bonds with each other in a single molecule. They use the valence electrons for sharing. The maximum number of valence electrons can be seven.