Presentation on theme: "CHEMICAL BONDING Occurs when 2 or more atoms combine by sharing or transferring electrons. –Can be from the same element (O 2 ) or different elements (NaCl)"— Presentation transcript:
CHEMICAL BONDING Occurs when 2 or more atoms combine by sharing or transferring electrons. –Can be from the same element (O 2 ) or different elements (NaCl) –Atoms combine so that they each have a total of 8 valence electrons (full octet)
16.1 Valence electrons Chemical bonds are formed only between the electrons in the highest unfilled energy level. These electrons are called valence electrons.
Group 1 Alkali MetalsGroup 1 Alkali Metals –1 valence e - Group 2 Alkaline-Earth MetalsGroup 2 Alkaline-Earth Metals –2 valence e - Groups 3-12 Transition MetalsGroups 3-12 Transition Metals –Variable valence e -
Group 13 Boron GroupGroup 13 Boron Group –3 valence e - Group 14 Carbon GroupGroup 14 Carbon Group –4 valence e - Group 15 Nitrogen GroupGroup 15 Nitrogen Group –5 valence e - Group 16 Oxygen GroupGroup 16 Oxygen Group –6 valence e -
Group 17 HalogensGroup 17 Halogens –7 valence e - Group 18 Noble GasesGroup 18 Noble Gases –8 valence e -
Lewis Dot Diagrams A picture that represents an atom’s valence electrons. Helpful for determining what atoms will bond to form compounds. Element symbol with dots around it for each valence electron (go around once before you pair up dots)