the central core of an atom
a particle in the nucleus of an atom that has a positive charge
a particle in the nucleus of an atom that has no charge
a particle in the nucleus of an atom that has negative charge
a substance that is made of only one particular type of atom and cannot be broken down into simpler substances
one or two letters that represent an elemen's name
a chart that arranges all the known elements by their properties
two or more atoms joined together
a molecule that consists of two or more diffrent elements
a group of chemical symbols and numbers that describes the types and numbers of elements present in a molecule
the measure of how compact matter is
the rearrangement of atoms within molecules with diffrent properties
a substance present at the start of a chemical reaction
a substance produced by a chemical reaction
the application of knowledge to accomplish a goal
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