Chemistry
The science that deals with the composition, structures, and properties of matter and how matter changes under different conditions
Matter
Any substance that occupies space and has mass (weight).
Energy
Not matter and does not occupy space or have mass
Element
The simplest form of chemical matter and contains only one type of atom. It can’t be broken down into a simpler substance without a loss of identity
How many elements are there in total and how many occur naturally?
118 elements known today, 98 occur naturally
Atoms