Chemistry: Section 1 0.0 / 5 ? ChemistryAtoms and compoundsIGCSEEdexcel Created by: HLeiperCreated on: 27-03-14 17:45 Atom The smallest particle of the chemical element that can exist 1 of 9 Molecule A group of atoms bonded together, representing the smallest fundamental unit of the chemical compound that can take part in a reaction 2 of 9 Element The simplest substances and hence cannot be broken down using chemical methods 3 of 9 Compound A thing that is composed of two or more separate elements 4 of 9 Mixture A substance made by mixing other substances together 5 of 9 Atomic Number Number of protons 6 of 9 Mass Number Total number of protons and neutrons 7 of 9 Isotopes Have the same number of protons but a different number of neutrons 8 of 9 Relative Atomic Mass How heavy different atoms are compared with the mass of one atom of carbon 12 9 of 9
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