Question

identify all of the items that represent an element and not a molecule. select all that apply
co₂
h
cao
li
ne
n₂

Explanation:

• An element is a pure substance made of only one type of atom. A molecule is formed when two or more atoms bond together.
• \(CO_2\) is a molecule made of carbon and oxygen atoms. \(CaO\) is a molecule made of calcium and oxygen atoms. \(N_2\) is a molecule (a diatomic molecule) made of two nitrogen atoms.
• \(H\) (hydrogen), \(Li\) (lithium), and \(Ne\) (neon) are single - atom representations of elements. \(H\) is an element (in its atomic form), \(Li\) is an element (a metal), and \(Ne\) is an element (a noble gas).

Answer:

H, Li, Ne