bn:01262848n
Noun Concept
Categories: Articles with permanently dead external links, Periods in the periodic table
EN
period 2 element  period 2  Period 2 elements
EN
A period 2 element is one of the chemical elements in the second row of the periodic table of the chemical elements. Wikipedia
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EN
A period 2 element is one of the chemical elements in the second row of the periodic table of the chemical elements. Wikipedia
The second row of the periodic table Wikidata
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