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