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Presentation transcript:

Copy what is underlined VALENCE ELECTRONS Copy what is underlined

1.Valence Electrons A. The electrons that are farthest away from the nucleus B. These e- are special because they are involved in chemical reactions/bonding

C. Held most loosely D. Can transfer

2. Elements in the same group have: Same number of valence electrons

valence e- around symbol 3.ELECTRON DOT DIAGRAMS CARBON NITROGEN NEON 5 4 8 __ Valence e- ____ val e- ____ val e- Draw valence e- around symbol C N Ne ELECTRON DOT DIAGRAM

4. Extra info A. Dark zigzag line on PT goes through semimetals B. Elements in the same row/period, have the same number of shells C. Isotopes have the same number of p+, but different number of n

ISOTOPE What is overall charge of each? NEUTRAL or 0 What particle is different? NEUTRONS