Bell Ringer 9-29-09 True/False: Elements in the same group have similar properties. List some properties of a metal. (What do metals look like?)

Chapter 4 Section 3 Metals

Physical Properties of Metals Shininess- Luster Malleable- can be hammered or rolled into flat sheets and other shapes Ductile- can be stretched or bent without breaking Conductivity- ability of an object to transfer heat or electricity to another object

Chemical Properties of Metals Reactivity- the ease and speed with which an element combines, or reacts, with other elements and compounds

Group 1- Alkali Metals Soft, silvery colored metals Very reactive!!! http://www.lyon.edu/webdata/Users/DMcDowell/GenChem/alkalishow.html Group 1- Alkali Metals Soft, silvery colored metals Very reactive!!!

Group 2- Alkaline Earth Metals Silvery-White Metals Fairly reactive Many are found in rocks in the earth’s crust

Groups 3-12 Transition Metals Most are good Conductors of electricity Malleable (easily bent/hammered into wires or sheets)

Other Metals

Lanthanide Series top row Actinide Series bottom row

Comparing the physical properties of metals and nonmetals Silvery gray color except copper and gold Solid at room temperature except mercury (liquid) Good conductors of heat and electricity Malleable – can be hammered into shapes (thin sheets) Ductile – can be pulled into wires Many different colors Sulfur – yellow Chlorine – green Bromine – orange Iodine - purple Many different states (phases) H, N, O – gas Br – liquid S, C, I – solid Poor conductors of heat and electricity (except carbon) Brittle – breaks when hit