Educator

Periodic Table, Electronic Configurations, Ionic Bond

• Look at overall shape of periodic table

• Periods and groups

• Group names; alkali metals(1A); alkaline earths(2A); halogens(7A)

• Learn significance of s, p, d, f

• Do examples of building up electronic configurations of atoms and monatomic ions including transition metals

• Look at how atomic sizes change around the periodic table

• Positive ions smaller than parent atom; negative ions larger than parent atom

• “Magic numbers” of electrons in noble gases show stability

• Ionization energies and how they change around the periodic table

• Electron affinity – important only for most electronegative elements, halogens, O, S.

• Characteristics of ionic compounds – crystalline, high m.p., conductors; electrostatic nature of ionic bond.