Rules for oxidation numbers Flashcards
1
Q
- Uncombined atoms always have a
A
0 charge
2
Q
- Group 1 atoms always have a
A
+1 charge
3
Q
- Group 2 atoms always have a
A
+2 charge
4
Q
- Oxygen always has a
A
-2 charge
5
Q
What are the exeptions to oxygens oxidation charge
A
In peroxides like H202 & Na2O2 oxygen has a -1 charge and in OF2 oxygen has a +2 charge.
6
Q
- Florine is always
A
-1
7
Q
What is the most electro negative element on the periodic table?
A
Florine
8
Q
- Halogens (second to last group) are ussualy
A
-1
9
Q
- Hydrogen combined with a non metal has a charge of
A
+1
10
Q
- Hydrogen combined with metals has a charge of
A
-1
11
Q
- Total charges of all atoms in a compound is
A
0
12
Q
- Total of charges for all atoms in a polyatomic compound is equal to
A
the charge of the polyatomic ion
