What does the group number tell us? - How many electrons are in the outer shell, What does the period number tell us? - How many electron shells there are., What elements are in Group 7? - The Halogens, What elements are in Group 1 - The Alkali metals, What elements are in Group 0? - The Noble gases, Why are alkali metals so reactive? - They only have one electron in their outer shell, Why are halogens so reactive? - They only need to gain one electron for a full outer shell, Why are noble gases so unreactive? - They already have a full outer shell.,

Periodic Table flashcards

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