The Chemical Elements The periodic table organizes elements into: Groups or Families that have similar properties

Periodic Table Organization Groups: Vertical Columns Periods: Horizontal Rows

Group Numbers and Family Names Representative Elements IAAlkali Metal Family IIAAlkaline Earth Metal Family IIIAAluminum Family IVACarbon Family VANitrogen Family VIAChalkogen family VIIAHalogen Family VIIIANoble Gas Family

Group Numbers Transition Elements IIIBSc IVBTi VBV VIBCr VIIBMn VIIIBFe, Co, Ni IBCu IIBZn

Inner Transition Elements Period 6 atomic #s Lanthanides Period 7 atomic #s 89 – 103 Actinides

4 General Classes of Elements 1. Metals

Characteristics High Luster Solid at Room Temperature (most) High Tensile Strength Malleable and Ductile Good Electrical Conductors Form Highly Colored Compounds

Gem Stones

Nonmetals

Characteristics Most are Gases at Room Temperature Solids are Brittle Poor Conductors of Heat and Electricity Good Insulators Properties vary Across and Down Table

Metalloids

Characteristics Solids at room temperature Less malleable than metals Less brittle than nonmetals Less conductive than metals More conductive than nonmetals Called Semi – conductors

Noble Gases

Characteristics Nonreactive Gases at Room Temperature

Don’t Inhale Helium