Elements and the Periodic Table
Abschlussbedingungen
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P
PeriodA horizontal row of elements in the periodic table. | |
Periodic LawThe principle that the physical and chemical properties of elements repeat in a regular pattern when elements are arranged by increasing atomic number. | |
Periodic tableA chart that organises all known chemical elements according to their atomic number and properties. | |
ProtonA positively charged particle found in the nucleus of an atom. | |
Pure substanceA material containing only one type of particle with a fixed composition. | |