This is the table of matter.
So first i want to teach you about pure substances a pure substance is made up of the same atom or molecule. A pure substance is also made up of two things elements and compounds. A element is a substance that is made entirely up of 1 atom, like hydrogen and nitrogen now lets talk about compounds, compounds are thing's that are composed of two or more separate elements here is an example water or hydrogen oxide and remember the difference between elements and compounds is elements are made up of the same atom while compounds use different atoms or two or more different elements. here is a short video on elements and compounds.