bobmarley2633 bobmarley2633
  • 26-09-2017
  • Chemistry
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What does the term "periodic" mean in the "periodic table of elements"?

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jriad1 jriad1
  • 26-09-2017
It's the rows. They are periods. (1,2,3,4,5,6,7 - the ones without the letters).
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