pure
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.
Atom of carbon?
A substance that can not be decomposed into simpler substance by a chemical or physical means is a chemical element.
A chemical element. All the known chemical elements are listed in the 'periodic table'.
This is called molecule.
This kind of reaction is called "decomposition".
an element
The process of changing food into a simpler substance is called COMBUSTION
elements
compounds
Yes.For sure you cab break it down into simpler components.