A substance can be a mixture or solution, rather than a compound. These do not require that the separate substances combine chemically.
An element is a substance that has only one type of atom.
Compounds
It's called a compound and water is an example.
Such a substance is especially called a compound.
A compound
A compound is the pure substance formed from the chemical combination of two or more different elements.
A substance that can't be separated is called a compound.
Compounds
This substance is called indicator.
Compound
It is called a compound.
compound
It's called a compound and water is an example.
The product is called a Compound
compound
a compound
A compound !
is called a "compound".