What prefix is used to denote five atoms in a chemical compound?

The prefix that denotes five atoms in a chemical compound is "penta." This term is derived from the Greek word "pente," meaning five. It is commonly used in the nomenclature of chemical compounds to indicate the presence of five identical atoms or groups in a molecule. For example, in the context of organic chemistry, the term "pentane" refers to a straight-chain alkane with five carbon atoms.

The other options do not accurately reflect the correct prefix for five atoms. "Quinta" and "quinto" are not standard prefixes in chemical nomenclature. "Hexa" is used to denote six atoms, which is unrelated to the question regarding five atoms. Thus, using "penta" is the appropriate choice when referring to five entities in a chemical context.