Chemistry Flashcards Template Page 2
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13Chemical Formulas
Empirical Formulas
–
simplest formula for a compound;
gives the types of atoms present and their relative
Chemical Formula
– a symbolic representation designed to
numbers.
indicate (at a minimum) the elements present and the relative
number of atoms of each element.
Molecular Formulas
–
based on an actual (existing)
molecules.
Empirical and molecular formulas give no info on how
the atoms are attached to each other.
Three kinds of chemical formulas
1)Empirical Formula
Structural Formulas –
shows the order in which atoms are
2)Molecular Formula
bonded together in a molecule and what types of bonds.
3)Structural Formula
There are different types of structural formulas.
Representing Compounds
Representing Compounds
Elements and Compounds
Example Ethylene Glycol (1,2 - ethanediol)
Empirical Formula
CH
O
–
3
Molecular Formula
C
H
O
–
2
6
2
Structural Formulas
OH
OH
H
C
CH
2
2
Condensed
Structural
atomic elements
molecular elements
molecular compounds
ionic compounds
Space Filling
structural
model
model
model
CH
(OH) CH
(OH)
Ball and Stick model
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2
Representing Compounds
Elements and Compounds
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