A molecule.
Such a group of atoms is called a molecule.
A group of atoms chemically joined together is called a molecule. Molecules can be made up of two or more atoms of the same or different elements bonded together.
Such a group is often called a "radical".
Molecule
a group of the same attoms create an element and a group composed of different atoms forms a compound
molecules
A molecule is a group of more than one atom joined together that acts like a single particle. The atoms in a molecule are held together by chemical bonds. Molecules can be composed of different types of atoms and can range in size and complexity.
Elements are those substances which have same constituent particle altogether. Molecules are a group of atoms joined together . Atoms of elements join together to form a molecule.
Two or more atoms joined together form a molecule. You can't say compound because you do not specify that the atoms are of different elements. You can have a molecule of oxygen because two or three atoms of oxygen can couple together by themselves, but it is not a compound, it is a molecule of oxygen.
a molecule
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
Atoms bond with each other to form a molecule. When a molecule has an overall charge, they can act as a single unit to bond with another ion. Examples are sodium 'carbonate' and magnesium 'sulfate'.