Development of the Periodic Table
Completion requirements
Browse the glossary using this index
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P
Perioda horizontal row of elements. | |
Periodic tablethe organised arrangement of all known chemical elements. | |
Periodicitythe repeating pattern of physical and chemical properties among the elements. | |
Predictiona statement about future discoveries based on scientific evidence and patterns. | |
Protona positively charged particle found in the nucleus of an atom. | |