they are called chemical elements.
Atom of carbon?
It is called chemical treatment
Decomposition
These substances are called reactants.
These substances are called carotenoids.
Substances that cannot be chemically broken down into simpler substances are called elements.
compounds
elements
Atom of carbon?
Digestion is the process of breaking down food into simpler substances. Digestion is of two types: mechanical or physical digestion, and chemical digestion.
This is called molecule.
A chemical reaction, though often it is not a simpler substance.
A substance that can not be decomposed into simpler substance by a chemical or physical means is a chemical element.
If the above didn't answer your question, a substance that can be broken down into simpler substances is called a compound. Even the simplest compounds can be broken down into individual elements.
That would be an Element.
This kind of reaction is called "decomposition".
In a chemical reaction, two or more substances separate into simpler components and then recombine into other substances. The separation into simpler components usually happens in water and the process is called ionization.