Group 1 Alkali Metals Contains Metals l Valence

Group 1: Alkali Metals Contains: Metals l Valence Electrons: 1 l Reactivity: Very Reactive l Properties: l l solids l soft l react violently with water l shiny l low density

Group 2: Alkaline-Earth Metals Contains: Metals l Valence Electrons: 2 l Reactivity: very reactive but less reactive than alkali metals (Group 1) l Properties: l l Solids l Silver colored l More dense than alkali metals

Group 13: Boron Group l Contains: 1 metalloid and 4 metals l Valence Electrons: 3 l Reactivity: Reactive l Other shared properties: l l Solid at room temperature

Group 14: Carbon Group Contains: 1 non-metal, 2 metalloids, and 3 metals l Valence Electrons: 4 l Reactivity: Varies l Other shared properties: l l Solid at room temperature

Group 15: Nitrogen Group Contains: 2 non-metals, 2 metalloids, and 1 metal l Valence electrons: 5 l Reactivity: Varies l Other shared properties: l l All but N are solid at room temperature

Group 16: Oxygen Group Contains: 3 non-metals, 1 metalloid, and 2 metals l Valence Electrons: 6 l Reactivity: Reactive l Other shared properties: l l All but O are solid at room temperature.

Groups 17 : Halogens Contain: Nonmetals l Valence Electrons: 7 l Reactivity: Very reactive l Other shared properties l ● ● ● Poor conductors of electric current React violently with alkali metals to form salts Never found uncombined in nature

Group 18 Noble Gases Contains: Nonmetals l Valence Electrons: 8 (2 for He) l Reactivity: Unreactive (least reactive group) l Other shared properties: l l Colorless, odorless gases at room temperature l Outermost energy level full l All found in atmosphere

Hydrogen Stands Apart H set apart because its properties don’t match any single group. l Valence electrons: 1 l Reactivity: very but loses the 1 electron easily l Properties: l l Similar metals to those of non-metals rather than