Mapping the Periodic Table

How are elements different? Elements are either metals, non-metals, and metalloids Each element has a different level of reactivity Reactive- indicates how likely an element is to undergo a chemical change

Metals Elements that: Conduct electricity & heat Are malleable (bendable) Are shiny Most are solids at room temperature Found on periodic table - Groups 1-14*; most elements are metals

Reactive Metals Group 1- Alkali Metals: most reactive of ALL groups Group 2- Alkaline Earth Metals: very reactive but not quite as much as Group 1 Both groups especially reactive with water.

Transition Metals Groups 3-12 Less reactive but are usually very malleable Very good conductors Gold, Silver, Iron, Copper, etc….

Rare Earth Metals Atomic numbers 57-71 are called Lanthanides. Atomic numbers 89- 103 are called Actinides. Hard to isolate in pure form so they are called rare.

Non-metals These elements are: poor conductors not malleable usually dull mostly gas at room temp Right side of periodic table

Halogens Group 17 Very reactive and love to form “salts”

Noble Gases Group 18 These gases do not react with any other elements, so they are considered “noble”

Metalloids Elements that have properties of both metals and non-metals Most common metalloid is Silicon Silicon is used to make microchips for computers because it is a semiconductor