M2 C5 Flashcards
1
Q
What is oxidation?
A
Loss of electrons / increase in oxidation number.
Oxidation is a key concept in redox reactions.
2
Q
Define oxidation number.
A
A number that represents the number of electrons lost or gained by an atom of an element.
A positive oxidation number indicates the loss of electrons.
3
Q
What do Roman numerals indicate in terms of oxidation states?
A
They are used to indicate the oxidation number of elements that may have different oxidation states.
Example: iron(II) and iron(III).
4
Q
What is a redox reaction?
A
A reaction in which one element is oxidised and another is reduced.
Redox reactions are fundamental in various chemical processes.
5
Q
What is reduction?
A
Gain of electrons / decrease in oxidation number.
Reduction is the opposite of oxidation.
