bn:01055753n
Noun Concept
Categories: Periods in the periodic table
EN
period 4  period 4 element  period 4 elements
EN
A period 4 element is one of the chemical elements in the fourth row of the periodic table of the chemical elements. Wikipedia
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EN
A period 4 element is one of the chemical elements in the fourth row of the periodic table of the chemical elements. Wikipedia
The fourth row in the periodic table of chemical elements Wikidata
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