There you can find the metals, semi-conductor(s), non-metal(s), inert noble gas(ses), Halogens, Lanthanoides, Actinoids (rare earth elements) and transition metals. Knowing the mass number and the atomic number of an atom allows you to determine the number of neutrons present in that atom by subtraction. Please note that the elements do not show their natural relation towards each other as in the Periodic system. The first chemical element is Hydrogen and the last is Ununoctium. The chemical elements ofįor chemistry students and teachers: The tabular chart on the right is arranged by Atomic number. This list contains the 118 elements of chemistry.
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