 Please write HW in your agenda.  Please update your table of contents.  Please open to your homework on pg 72 so it can be checked! Page #TitleDate 73Metals, Nonmetals, and Metalloids12/03

 The periodic table is sorted by similarities in properties  There are three main categories on the periodic table: metals, nonmetals, and metalloids.  These categories are broken up into smaller families with more specific properties. (Alkali metals, Halogens, Noble Gases, etc.)  Today we’re going to look at the 3 main categories and the properties that they share.

 Have luster (shiny)  Malleable and ductile  High densities and high melting points  Good conductors of electricity, but poor insulators  Most are solids  Examples of families: alkali metals and alkaline earth metals are very reactive.

 Have no luster  Brittle  Good insulators, but poor conductors of electricity  Most are gases  The elements that make up life are nonmetals (carbon, oxygen, hydrogen)  Examples of families: Halogens: Very reactive Noble gases: Nonreactive or inert

 Have properties of metals and nonmetals  Semiconductors: conducts electricity at high temperature, insulates at low temperatures  Used in electronic devices  Example: Silicon is the most abundant metalloid.

 A recent string of crimes have been occurring linked to some suspicious elements…  Your job is to read the crime scene reports, identify the guilty element, and determine if the element is a metal, a nonmetal, or a metalloid.

 When you have finished Element Mysteries, open your notebook to pg 66.  Use this page to show us what you learned about metals, nonmetals, and metalloids.  Make it as creative as possible: a drawing, a poem, a song, a Venn diagram, a comic, a quiz, etc.