oxidation states

Question 1

what is meant by the term oxidation state ?

Answer 1

• the number of electrons something needs to lose or gain to become neutral

Question 2

what is the oxidation state of uncombined elements ?
e.g Na , Fe and why ?

Answer 2

oxidation state = 0
- because they are already neutral

Question 3

what is the oxidation state of diatomic molecules ?

Answer 3

oxidation state = 0

Question 4

what is the oxidation state on simple ions?
e.g CL- Cu2+

Answer 4

oxidation state is the same as the charge

Question 5

state the oxidation state of Al2O3

Answer 5

(Al +3 , O -2)

Question 6

how can oxidation states be worked out ?

Answer 6

oxidation states can be worked out from an elements position in the periodic table

Question 7

what oxidation states do group 3 elements form ?

Answer 7

form 3+ ions
oxidation state = +3

Question 8

what do group 6 elements form in terms of oxidation states ?

Answer 8

form 2- ions
oxidation state = -2

Question 9

what is the oxidation state of oxygen and what are the xceptions ?

Answer 9

oxygen will have an oxidation state of -2 unless its in hydrogen peroxide (H2O2) or in a compound with fluorine (F)

Question 10

what is the oxidation state of oxygen in H2O2 ?

Answer 10

-1

Question 11

what is the oxidation state of oxygen in a compound with fluorine ?

Answer 11

positive +2

Question 12

what kind of oxidation states do transition metals have ?

Answer 12

transition metals have varying oxidation states

Question 13

what is the oxidation state of iron in Iron (II) oxide ?

Answer 13

oxidation state is the same as the stock notation
= +2

Question 14

What is the oxidation states of group 4 ions ?

Answer 14

They don’t usually form ions