This is called a mixture.
Two or more elements combined can become a compound.
A substance composed of more than one type of atom, chemically combined, is called a compound.
Compound
These substances are called catalysts.
Two or more substances mixed together but not chemically combined form a mixture.
Compound
compound
That is called a mixture.
compound
A compound.
atom
This is a chemical compound.
A substance made of two or more elements chemically combined in a specific proportion is called a compound. A substance composed of two or more elements combined chemically in a fixed proportion by mass is called a compound. A chemical compound can be held together by a covalent bond or an ionic bond.
A combination of two or more substances which have been combined so that each substance retains its own chemical identity is called a mixture. The different components of a mixture can be visually distinguished. For example, water and flour create a mixture.
It is called a compound
an oxidation
reaction