Module 2: Atoms And Reactions 2 Flashcards
Oxidation number of atoms in uncombined elements
Oxidation number is 0
What is the oxidation number in simple monatomic ions??
Oxidation number is the same as the charge on the ion
What is the relationship between electronegativity and oxidation numbers
The more electronegative element will have a negative oxidation number
Oxidation number in oxygen
In compounds nearly always -2
Oxidation number in hydrogen
In compounds nearly always +1
Oxidation number of fluorine
ALWAYS -1
Exceptions of hydrogen’s oxidation number
When combined with a more electropositive element
Hydrogen has an oxidation number of -1
Exception of the oxidation number of oxygen
When oxygen is bound to something more electronegative than itself
May have an oxidation number of +2
Oxidation number of oxygen in peroxides
-1
Oxidation definition
Loss of electrons
Increase in oxidation number
Reduction definition
Gain of electrons
Decrease in oxidation number
What is an oxidising agent??
An element or compound that caused the oxidation of another
It accepts electrons and therefore being reduced itself
What is a reducing agent??
An element or compound that caused the reduction of another
By donating electrons and therefore being oxidised itself
What is a redox equation??
Oxidation and reduction both occuring
Cannot have one without the other
