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The number of protons in the nucleus of an atom, which identifies the element to which the atom belongs.
The smallest particle of any element that retains the properties of the element.
Balanced chemical equations
A chemical equation that identifies each pure substance in the equation as well as showing the matching number of atoms of each element on both sides.
Binary covalent compound
A compound that contains two non-metal element joined together by one or more covalent bonds.
A diagram that shows te arrangement of an element's subtomic particles and the number of electrons in each shell surrounding the nucleus of an atom.
The representation of a chemical reaction in words or symbols.
One or more chemical changes that occur for the same time
A pure substance that is composed of two or more atoms chemically combined in a specific way.