lvititoe1p7gi6l lvititoe1p7gi6l
  • 19-05-2018
  • Chemistry
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What does the period number indicate on periodic table

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pcgroh17oyrf80
pcgroh17oyrf80 pcgroh17oyrf80
  • 19-05-2018
It’s atomic mass is what the number means.
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thankins2017p7070c
thankins2017p7070c thankins2017p7070c
  • 20-05-2018
The period number indicates what electron shell level is being filled. For example, Magnesium is the second element in the third period, which means that there are two electrons in the third shell, assuming that it is neutral.
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