7.4 Properties of Elements & Compounds

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    properties elements and compounds
    PROPERTIES OF TYPES OF COMPOUNDS/SUBSTANCES
    IONIC MOLECULAR NETWORK COVALENT METALLIC
    High m.p and b.p.
    Brittle
    Lattice Energy ∝ q1q2/r
     
     
    Lower m.p. and b.p.
     
     
     
     
    High m.p. and b.p.
     Ex. C(diamond)
     SiO2
     
     
    Conduct electricity
     Conduct heat
     Luster
     Malleable
     Ductile
    PROPERTIES OF VARIOUS GROUPS FROM THE PERIOD TABLE
    Alkali Metals Highly reactive with water due to low ionization energies
    Alkaline Earth Metals Not nearly as reactive with water (increasing reactivity going down the group)
    Oxides Metal oxides are basic (examples: Na2O, BaO)
    Non-metal oxides are acidic (examples: NO2, SO3, CO2)
    Halogens Have high (very negative) electron affinities