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For its nomenclature we use the
Stoichiometric nomenclature: it is formed by two
words. The first word is the name of the first nonmetal with a Greek prefix that
shows us the number of atoms of the nonmetal ; the second word is the root of
the second nonmetal plus the suffix "-ide", with a Greek prefix that shows us
the number of atoms of the nonmetal.
The Greek prefixes are:
| 1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
| mono- |
di- |
tri- |
tetra- |
penta- |
hexa- |
hepta- |
octa- |
nona- |
deca- |
undeca- |
dodeca- |
Prefix-NONMETAL
prefix-NONMETAL-ide
The prefix mono- is used only before the
second nonmetal, and when the ratio is 1:1.
The IUPAC also accepts Stock´s nomenclature for these compounds, though it is
better to use the stoichiometric nomenclature when all the atoms are nonmetal
and Stock´s nomenclature when there are metallic atoms.
The relative positions of the elements in these compounds are those in this
list:
B, Si, C, Sb, As, P, N, Te, Se, S, I, Br, Cl, O, F.
But don’t worry, in general formulae are given correctly.
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In the name: The first word indicates the first
element in the formula, the prefix indicates the subscript of the element in the
formula, The second word indicates the second element in the formula, and the
prefix indicates the subscript of the element in the formula.
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In Formulae you have an exercise to write the names of these substances
and to check your results. You also have the answer to the exercise.
In Names you have an exercise to write the formulae for these substances
and to check your results. You have to introduce the formulae without
subscripts, for example for water = H2O. You also have the answer to the
exercise.
   
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