Bell Work: Outer Electrons 1.How many electrons does magnesium have in level 3? 2.How many electrons does potassium have in level 4? 3.How many electrons.

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Presentation transcript:

Bell Work: Outer Electrons 1.How many electrons does magnesium have in level 3? 2.How many electrons does potassium have in level 4? 3.How many electrons does oxygen have in level 2? 4.How many electrons does phosphorous have in level 3? 5.How many electrons does argon have in level 3?

Valence Electrons Electrons in the outmost level. # valence e - depends on the family Group 1A has 1 valence electron Group 2A has 2 valence electrons Group 3A has 3 valence electrons Group 4A has 4 valence electrons (half full – no ions formed) Group 8A has 8 valence electrons (most stable – no ions formed)

Lewis dot Structures Used to show valence electrons One dot per side, then make pairs Can have up to 8 dots