Metals

Classified by: Physical Properties Good Conductors Some are magnetic High melting point Solid at room temp Hardness Shininess Malleability Ductility

wide range of Chemical Properties Reactive (ex: Na) Unreactive (ex: Au & Cr) Inbetween (Fe rusts) Less reactive as you move L to R Corrode= process of metal reacting & wearing away

Alloys Mixture of metals consisting of 2 or more substances, but not chemically combined Useful to combine the best properties into a single substance Examples Cu + Sn = bronze Cu + Zn = brass Fe + C + Cr + V= stainless steel

Important Alkali Metals Alkali Metals (Group 1) Most reactive Never found uncombined in nature Very soft & shiny Important Alkali Metals Na- sea water & salt beds K & Na- needed for muscle & nerve functions Li- compound used in behavior drugs

Alkaline Earth Metals (Group 2) 2 Most Common AEM’s Mg Old camera flash bulbs In light weight alloy with Al (planes & ladders) Ca bones Not as reactive as group 1 Never found alone in nature Fairly hard Bright white Good conductors

Transition Metals (Groups 3-12) So similar to each other that difference between nearby columns is hard to detect Fairly stable Hard Shiny Good conductors Ex: Fe, Cu, Ni

Lanthanides some say rare-earth and some say inner-transition elements can be found naturally on Earth Only one element in the series is radioactive

Actinides all radioactive and some are not found in nature Some of the elements with higher atomic numbers have only been made in labs