L9ivvy2rustar L9ivvy2rustar
  • 03-11-2016
  • Chemistry
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Has 7 electrons in the 4th level

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TadaMat21
TadaMat21 TadaMat21
  • 04-11-2016
It's Bromine(Br-) Group 17 element that has 7 valence electrons on the fourth energy level.
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