A neutral group of atoms held together by covalent bonds is a

Molecule

Explanation:

A molecule is a particle made up of two or more atoms held together by chemical bonds. A molecule is different from an ion because it does not carries a charge. Molecules are chemically bonded together by either covalent bonding or ionic bonding. A covalent bond involves the sharing of electron pairs between atoms. Examples of molecule with covalent bonding include H₂ and NH₃. Therefore, a neutral group of atoms held together by covalent bonds is a molecule.