9.1 Oxidation and Reduction Flashcards
Oxidation number of Hydrogen + a nonmetal
+1
Oxidation number of Hydrogen + a metal
-1
What is the oxidation of a monatomic ion?
Ionic charge
Oxidation number of Group 1 elements in compounds
+1
Oxidation number of Group 2 elements in compounds
+2
Oxidation group 7 elements in compounds
-1
What is the exclusion to the oxidation rule of group 7 elements in compounds?
when group 7 elements are in compounds with elements that have a higher electronegativity, the oxidation number becomes positive
What is the sum of oxidation numbers in a Neutral compound?
zero
What is the sum of oxidation numbers in polyatomic ions?
The ionic charge of the ion.
ex. SO4^2- =-2
What is the oxidation number of an atom that is uncombined?
Zero
ex. Na . N2 . S8
How do transition metals and Main group non metals show more than one oxidation state?
Through roman numerals.
When are roman numerals shown to indicate the oxidation state of compounds?
When naming the compounds
How can you recognize when a redox reaction is oxidation?
When the oxidation number of the atom increases
How do you recognize when a redox reaction is reduction?
When the oxidation of an atom decreases
What is Oxidation?
Gain of oxygen
increase of oxidation number
Loss of hydrogen
loss control of electrons.