Electronic configurations and the periodic table

1 mark · Normal

Which of the following elements is in period 2 and group 7 of the Periodic Table?

AFluorine (2,7)BChlorine (2,8,7)CNitrogen (2,5)DNeon (2,8)

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Correct option: Fluorine (2,7)

Common mistakes: Choosing Chlorine

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Marking points

B1 · 1 mark · Correct option selected

Worked solution

Fluorine (2,7) has 2 shells (period 2) and 7 electrons in its outer shell (group 7).

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