Br5ohmamo7rychelling Br5ohmamo7rychelling
  • 13-11-2016
  • Biology
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what is a period in chemistry

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princegn
princegn princegn
  • 13-11-2016
A period is the name given to a horizontal row of the periodic table. The periodic table has seven periods. Period 1 contains only two elements: hydrogen and helium.
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