Question

Of the chemical formulas MgO, Br₂, Ne, and CO₂,

which represents both an element and a molecule?
Explain your answer.

Answer 1

Br2 represents both an element and a molecule.

A molecule is defined as a group of atoms bonded together. An element is defined as a substance that cannot be chemically broken down further into simpler substances. Br2 is only bromine and it is two bromine atoms boned together to form a molecule.