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11 January, 19:00

Why is neon in the same group of the periodic table as helium?

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  1. 11 January, 19:18
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    Neon and helium both have full valence shells. This means that the out-most electron shell of the atom is full. In neon, the valence shell is 8 electrons, represented by the number of atoms in the family. In helium, the valence shell is only 2 electrons, which is what it has.
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