What are these? Elements of Art Elements that are organized to obtain Unity. space.
As the name might suggest (BInary), these compounds contain exactly two elements. In this class...
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Binary Molecular compounds
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Transcript of As the name might suggest (BInary), these compounds contain exactly two elements. In this class...
Binary Molecular compounds
As the name might suggest (BInary), these compounds contain exactly two elements.
In this class both of these elements will be non-metals.
If a compound is made of exactly two elements and both of them are non-metallic you will use the skills you learn today to name the compound.
How to identify them
Names of binary molecular compounds are NOT to be memorized. They must be figured out.◦ NO2 is called nitrogen dioxide.
◦ P2O5 is called diphosphorous pentoxide.
◦ SO3 is called sulfur trioxide. Today I will teach you how to name these
compounds. NOTE: All are made up of exactly two non-
metallic elements.
Examples
Look right. You will want to copy this chart down.
These prefix indicate the number of each atom present in a compound.
Rule 1: If the first element has only one atom it receives no prefix.
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Rule 2: The second atom ALWAYS gets a prefix, even if there’s only one.
CO is called carbon monoxide.
Rule 3: The second atom ALWAYS ends in “ide”.
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Here’s an example problem:◦Name:
Sulfur hexafluoride
◦Symbol
SF6
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Here’s another example problem:◦Name:
Tetraphosphorous decoxide
◦Symbol
P4O10
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Here, you try one
◦Name:
Carbon tetrafluoride
◦Symbol?????
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Here, you try one
◦Name:
Carbon tetrafluoride
◦SymbolCF4
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Try another one:◦Name:???
◦Symbol
PCl5
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
Try another one:◦Name:Phosphorus pentachloride
◦Symbol
PCl5
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
One last one:◦Name:??????
◦Symbol
N2O
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
One last one:◦Name:Dinitrogen monoxideBoth have prefixes!!!
◦Symbol
N2O
Prefix systemNumber of atoms
Prefix
1 mono
2 di
3 tri
4 tetra
5 pent
6 hex
7 hept
8 oct
9 non
10 dec
That’s it, there is no more. All you need to do now is practice. Use the two files below this PowerPoint to work on converting between name and symbol, symbol and name. Once you’ve mastered this skill move right on to naming hydrocarbons.
That’s it
