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chm- group characterisitics

chm- group characterisitics - • Scarce except aluminum...

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S Block Elements • Group 1: Alkali Metals o Don’t occur in nature as elements—COMPOUNDS o Very reactive o Stored in solutions other then O or water o Form ionic compounds o Good conductors o Silver luster, soft, malleable, ductile o Low melting point • Group 2: Alkali Earth Metals o Do not occur naturally in elemental state o Occur as carbonates, phosphates, silicates and sulfates o 2 electrons in outer shell o Less reactive then alkali metals o Form ionic compounds o Good conductors o Silver luster Transition Metals (3-12) • Contain one or two electrons in their outermost shell • Higher melting point, harder then elements in Groups 1&2 • Good conductors • Form colored compounds Group 13—Boron Family • Don’t occur naturally in elemental form
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Unformatted text preview: • Scarce except aluminum which is the most abundant • Soft and low melting points • Boron is a metalloid, all others are metals Group 14—Carbon Family • Very different physical and chemical properties • Relatively Unreactive4 valence electrons • Form covalent compounds Group 15—Nitrogen Family • Covalent compounds • Solids at room temp except for nitrogen • 5 valence electrons Group 16—Oxygen Family • Elements/Compounds • 6 valence electrons • Covalent compounds • Diatomic and polyatomic molecules • Br I N Cl H O F Groups 17—Halogen Family • Match up well with group 1 • Most reactive non-metals • Form negative ions and combine to form ionic compounds...
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