Gas
Two or more atoms of different elements joined together form a compound. If it is a metal and non-metal (for example sodium and chlorine), they are ionically bonded. If it is two non-metals (for example methane is carbon and hydrogen), they are covalently bonded.
Aluminum chloride is a compound composed of aluminum and chlorine atoms. Its chemical formula is AlCl3, indicating that each molecule contains one aluminum atom and three chlorine atoms joined together.
a molecule
molecule
Diatomic oxygen is a diatomic molecule joined by a double covalent bond.
A molecule.
Usually you would name chlorine as an element, and not an atom. An element has atoms, and there can be a chlorine atom. But according to terminology, you would name it as an element.
Two or more atoms of different elements joined together form a compound. If it is a metal and non-metal (for example sodium and chlorine), they are ionically bonded. If it is two non-metals (for example methane is carbon and hydrogen), they are covalently bonded.
Aluminum chloride is a compound composed of aluminum and chlorine atoms. Its chemical formula is AlCl3, indicating that each molecule contains one aluminum atom and three chlorine atoms joined together.
lactose
A particle composed of one or more atoms is called a molecule
Molecule
a molecule
molecule
Sodium(Na) and chlorine(cl)
It is a molecule!
A molecule.