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Science Vocabulary #12

A material made up of two or more different substances which are mixed but are not combined chemically.
It tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.
A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
It states that mass is neither created nor destroyed.
It is used to describe where electrons are when they go around the nucleus of an atom.
A character, usually a letter or number, that's printed slightly below and to the side of another character.
Is a negatively charged subatomic particle.
The shorthand scientists use to describe a chemical reaction.
The number in front of the formula. It tells us how many molecules of a given formula are present.
Defined as substances that are made of only one type of atom or only one type of molecule.