Determine the number of shells and the number of valence electrons for: CARBON 2nd Period = 2 shells 4th Group = 4 valence electrons Valence Electrons-

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Presentation transcript:

Determine the number of shells and the number of valence electrons for: CARBON 2nd Period = 2 shells 4th Group = 4 valence electrons Valence Electrons- electrons in outermost shell Core Electrons- electrons an atom has contained in its inner shells

Determine the number of shells and the number of valence electrons for: Sodium 3rd Period = 3 shells 1st Group = 1 valence electron 10 core electrons

Determine the number of shells and the number of valence electrons for: Helium is the exception in Group 8 Since it has just one shell, that shell can only fit 2 electrons instead of 8 It is in this group because all the elements have a full outer shell Helium 1st Period = 1 shell 8th Group = 2 valence electrons

Name and draw the atomic diagram and determine the number of shells and the number of valence electrons: Symbol Name Diagram # of Shells # of Valence Electrons Ne H Be K S

Name and draw the atomic diagram and determine the number of shells and the number of valence electrons: Symbol Name Diagram # of Shells # of Valence Electrons Ne NEON 2 8 H HYDROGEN 1 Be BERYLLIUM K POTASSIUM 4 S SULFUR 3 6