What is a pure substance made of only one kind of atom?

What is a pure substance made by chemically combining two or more elements; represented by a chemical formula?

what is a substance that is not mixed with any other substance

What is representation of the name of an element; written as a capital letter or a capital letter followed by a lowercase letter(s)?

What do you call two or substances combined together?

What is a representation of a compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element?

A mixture that can be easily separated by natural means is called what?

A mixture that can NOT be easily separated by natural means is called what?

Salt is considered to be?

saltwater is considered to be ?

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