Atoms, Elements and Molecules 0.0 / 5 ? ChemistryAtoms, Elements and MoleculesASEdexcel Created by: Emmanuel.Created on: 24-06-20 07:55 Atom the smallest particle of a chemical element that can exist. 1 of 8 Element consists of one type of atom - they are defined by the number of protons they posses. 2 of 8 Isotope forms of the same element that contain equal number of protons but different numbers of neutrons. 3 of 8 Ion an atom or molecule with a net electric charge due to the loss or gain of electrons. 4 of 8 Molecule an electrically neutral group of two or more atoms held together by chemical bonds. 5 of 8 Compound a substance formed when two or more chemical elements are chemically bonded together. 6 of 8 Empirical Formula the simplest whole number ratio of the number of atoms of each element present in a compound. 7 of 8 Molecular Formula provides the number of each atom that makes up a molecule. 8 of 8
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