redox

Question 1

what is an oxidation number?

Answer 1

the number of electrons an atom uses to bond with any other atom

Question 2

what is the oxidation umber of an uncombined element such as C H O2?

Answer 2

0

Question 3

what is the oxidation number of combined oxygen such as H2O?

Answer 3

-2

Question 4

what is the oxidation number in oxygen peroxides? (H2O2)

Answer 4

-1

Question 5

what is the oxidation number of hydrogen in metal hydrides such as LiH?

Answer 5

-1

Question 6

what is the oxidation number of a simple ion?

Answer 6

charge on the ion

Question 7

what is the oxidation number of S in SO42-

Answer 7

+6

Question 8

define oxidation?

Answer 8

oxidation is loss of electrons
increase in oxidation number

Question 9

define reduction?

Answer 9

gain of electrons
decrease in oxidation number

Question 10

what is a redox reaction?

Answer 10

a reaction where both oxidation and reduction takes place

Question 11

what is the oxidation number of a metal?

Answer 11

0 because it is an uncombined element