They are subatomic particles.
An element is the only substance that cannot be broken down.
Element
An Element ... A substance that cannot be broken down into simpler substances by chemical means.
a pure substance is made up of only one type of atom. atoms can't be broken down (divided) definition of an atom: that which cannot be divided. there ya go! ur welcome :) -shamansh
An element cannot be broken down into a simpler substance by chemical means.
Not: atoms The answer is an element
You think probable to atoms, indestructible in chemical processes.
A pure substance that cannot be broken down is an Element.
A substance that cannot be broken down is a pure substance
It is an element, composed of atoms.
Atoms can be broken down, so it is a quark or a lepton.
T=It is true that compounds is a type of substance. This substance cannot be broken down.