What does the group number of a column in the periodic table represent?

Answer 1

It represents the number of valence electrons for the elements in the group.

For the representative elements (main group elements), groups 1/IA-2/IIA and 13/IIIA to 18/VIIIA, the group number represents the number of valence electons. Groups 1/IA-2/IIA have one and two valence electrons, respectively. Groups 13/IIIA to 18/VIIIA have three to eight valence electrons, respectively.

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Answer 2

Cooper Anderson

The number of valence electrons that an element in a group possesses is indicated by the group number of that column in the periodic table.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.