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Helium has atomic number 2 but resides at top of group 8a which is most likely reason for its location in periodic table?

Anonymous

∙ 15y ago

Updated: 8/17/2019

In the Bohr-Rutherford Diagrams, the first orbit has only 2 electrons. Since there is only two, helium fills up the valence orbit, therefore it is in the last column.

Wiki User

∙ 15y ago

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