Periodic Table

1. A holiday decoration Hydrogen + Tungsten + Rhenium + Astatine 2. Water vapor Americium + Sulfur + Tellurium 3. Not first Cobolt + Neodymium + Selenium 4. Lemons make you do this Erbium + Uranium + Potassium + Phosphorus + Carbon

Periodic Table Rows are called periods Columns are called groups or families Groups 1, 2, and 13 – 18 are called representative elements Groups 3 – 12 are called transition elements

Specific Names Group 1 – Alkali Metals Group 2 – Alkaline Earth Metals Group 13 – Boron Group Group 14 – Carbon Group Group 15 – Nitrogen Group

Specific Names Group 16 – Chalcogens Group 17 – Halogens Group 18 – Noble Gases Group 3 – 12 – Transition Metals Inner Transition Metals Lanthanide Series (57 – 70) Actinide Series (89 – 102)

Metals Nonmetals Generally shiny when smooth and clean Solid at room temperature Good conductor of heat and electricity Ductile Malleable Left of stair step line Generally gases at room temperature Dull, brittle solids Poor conductors of heat and electricity Right of stair step line

Metalloids Has physical and chemical properties of both metals and nonmetals Touching the stair step line Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, Astatine, Uus, Uuo

What do you call a clown who's in jail? A silicon!

Alkali Metals Very reactive Usually exist as compounds with other elements React violently with water, stored in oil One valence electron Silver in color

Alkaline Earth Metals Also very reactive, but less so than alkali metals Two valence electrons (full s shell) Usually found in compounds Silver in color

Transition Elements (Metals) Loosely bound electrons Excellent conductivity Electrons in d orbitals Usually 2 (or 1) valence electrons Use d and s electrons to bond Very reactive Silvery blue in color at room temperature

Halogens Are very reactive Seven valence electrons, need to gain one Can be found in all three states at room temperature Solid: Astatine and Iodine Liquid: Bromine Gas: Chlorine and Fluorine

Noble Gases Extremely unreactive Eight valence electrons Very stable Used to be called Inert Gases