CO
sodium
A pure substance that cannot be broken down into simpler substances by physical or chemical means is an element. This is because Elements can't be broken down chemically into other substances because there is nothing to break them down into.
Copper Sulfate CuSO4 or Cu2SO4 is a chemical compound which can only be broken down by chemical means, so yes it is a pure substance.
All of the elements of the Periodic Table cannot be broken down into simpler substances.
Is a pure substance such as an element. Remember elements can not be broken down further by chemical or physical processes.
An element is a pure substance that can not be broken down by chemical means into other substances. A compound is a pure substance that cannot be broken down by physical means but it can be broken down by chemical means.
An element cannot be broken down into a simpler substance by chemical means.
The simplest substance that you can obtain by ordinary means is an element.An element is a substance than cannot be separated or broken down into simpler substances by chemical means.
an element is a substance that cannot be broken down into a simpler form by chemical means
element, compound, or an atom
An element is a pure substance that cannot be broken down into simpler substances by chemical means.
cannot be broken down into simpler substances by chemical means
A pure substance that cannot be broken down into simpler substances by physical or chemical means is an element. This is because Elements can't be broken down chemically into other substances because there is nothing to break them down into.
An element.
sodium
element
An Element ... A substance that cannot be broken down into simpler substances by chemical means.