Chemistry compound and reaction
what are oxidation numbers?
they represent the number of electrons an atom must gain or lose to return to its neutral state
Na always has an oxidation number of _______?
+1 oxidation number
What is rule 5?
The oxidation numbers of all the atoms in a polyatomic ion add up to it’s charge
what is the free element rule?
The oxidation number of atoms in there pure form and atoms in pure element zero.
What is the criss cross Meathod?
Absolute value of an oxidation number of one ion as the subscript of another element.
What is Polyatomic ions
covalently bonded groups of atoms that carry a change.
what is the ion rule?
The oxidation number of a manatomic ion is equal to the charge of the ion.
Oxygen is normally an oxidation number of _____?
-2 oxidation number
What is the zero sum rule?
I can't bring people back from the dead. It's not a pretty picture. I DON'T LIKE DOING IT! The sum of all the oxidation numbers in a compound must be zero
How do you find oxidation numbers?
If one rule contradicts another, the first in the list should be followed.
What is the specific oxidation rule?
Certain electrons negatively have the same oxidation number in compounds. A. Akali Metals - always have + 1. B. Alkaline Earth Metals- always have +2. C. Hydrogen usually has +1 sometimes has -1. D. oxygen usually has -2
Please use the bord to do a criss cross Meathod example for Aluminum and Oxide
Al+3 O2- = Al2O3