Chemistry Flashcards Template Page 3
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13Molecular Elements
Compound
Ionic or Molecular ?
CaBr
2
Fe
O
2
3
PCl
5
AlCl
3
H
O
2
Elements and Compounds
Elements and Compounds
Ionic Compounds and their Formulas
Ionic Compounds
Example : Sodium Chloride
metals + nonmetals
+
• Each Na
ion is surrounded
by six Cl
-
ions (and vice
no individual molecule units, instead have a 3-
versa)
dimensional array of cations and anions made of
formula units
-
• Can’t assign one Cl
ion
+
exclusively to one Na
ion
+
-
• Ratio of Na
to Cl
is 1:1
many contain
polyatomic ions
several atoms attached together in one ion
Elements and Compounds
Ionic Compounds
3
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