Atoms, Molecules, And Ions Worksheet - Chapter 2 Page 25
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27If the prefix ends with
a
or
o
and the name of the
element begins with a
vowel, the two successive
vowels are often elided
into one:
N
O
: dinitrogen pentoxide
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5
Summary of Nomenclature of Binary Compounds
Cations
1. Cations formed from metal atoms have the same name as the metal
2. If a metal can form different cations, the positive charge is indicated by a
Roman numeral in parenthesis following the name of the metal.
–ous
–ic
•
Sometimes the ending
and
will be used to distinguish lower
and higher charged ions, respectively.
3. Cations formed from nonmetal atoms have names the end in –ium.
Anions
1. Names of monatomic anions formed by replacing the ending of the element
with –ide.
–
2. Polyatomic ions (oxyanions) containing oxygen have names that end in
ate
or
–ite
.
3. Anions derived by adding H
+
to an oxyanion are named by adding as a
prefix the word hydrogen or dihydrogen, as appropriate.
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