Seudónimo Seudónimo
  • 08-12-2016
  • Chemistry
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Elements in the periodic table are arranged in columns or

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Аноним Аноним
  • 08-12-2016
maybe by protons i forgot how to spell it :(
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jacobv10
jacobv10 jacobv10
  • 08-12-2016
They are arranged by their atomic number which can be figured by counting how many protons or electrons they have.
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