Chem Unit 3 Test

• Allotrope: each of two or more different physical forms in which an element can exist. Ex:) Graphite, charcoal, and diamond are all allotropes of carbon.
• Metals: shiny, malleable(bendable), ductile(can turn into wires), lose electrons when bonding, conduct heat and electricity.
• Nonmetals: dull, brittle when solid, non conductors of heat and electricity, gain electrons when bonding.
• Metalloids: somewhere between metal and nonmetal, can be shiny or dull, and are somewhat(moderately) conductive.
• Alkali Metals: highly reactive, 1 valence electron, quickly oxidizes in air, forms stronger bases.
• Alkaline Earth Metals: moderately reactive, 2 valence electrons, form stronger bases.
• Transition Metals: multiple oxidation states, can form colored solutions, hard/tough metals.
• Lanthanide Metals: rare earth metals, soft/malleable, oxidize in air.
• Actinide Metals: radioactive and can oxidize in air.
• Non-Metal - Noble Gases: inert/unreactive, full valence shell(8 valence electrons).
• Non-Metal - Halogens: Highly reactive, 7 valence electrons, diatomic, poisonous.
• Diatomic Elements: Br, I, N, Cl, H, O, F