Question

which of the following represents a covalent molecule?
select all that apply
a co₂
b cl₂
c o₂
d he

Explanation:

• For \(CO_2\): Carbon and oxygen are non - metals. They share electrons to form covalent bonds, so \(CO_2\) is a covalent molecule.
• For \(Cl_2\): Chlorine atoms (non - metals) share electrons between them. The bond in \(Cl_2\) is covalent, and it is a covalent molecule.
• For \(O_2\): Oxygen atoms (non - metals) share electrons. The \(O = O\) bond is covalent, and \(O_2\) is a covalent molecule.
• For \(He\): Helium is a noble gas. It exists as single atoms (not molecules with covalent bonds) as it has a full valence shell and does not form covalent bonds under normal conditions.

Answer:

A. \(CO_2\), B. \(Cl_2\), C. \(O_2\)