Oxidation Numbers

Question 1

Define oxidation number

Answer 1

The charge that an atom has or appears to have when electrons are distributed according to certain rules

Question 2

What is the oxidation number of any uncombined element?

Answer 2

Zero

Question 3

What is the oxidation number of F

Answer 3

0

Question 4

What is the oxidation number of Na

Answer 4

0

Question 5

What is the oxidation number of an ion of an element the same as?

Answer 5

It’s charge

Question 6

What is the oxidation number of Br in Br-

Answer 6

-1

Question 7

What is the oxidation number of Fe in Fe2+

Answer 7

2+

Question 8

What does oxygen usually have an oxidation number of?

Answer 8

-2

Question 9

Under what conditions does oxygen not have an oxidation number of -2

Answer 9

In peroxides

And in the compound OF2

Question 10

What is the oxidation number of Oxygen in H2O2

Answer 10

-1

Question 11

What is the oxidation number of Oxygen in OF2

Answer 11

+2

Question 12

What oxidation number is hydrogen usually assigned?

Answer 12

+1

Question 13

What oxidation number is hydrogen assigned in the metal hydrides?

Answer 13

-1

Question 14

What oxidation number is usually assigned to the halogens?

Answer 14

-1

Question 15

Under what conditions are the halogens not assigned an oxidation number of -1?

Answer 15

When bound to a more electronegative atom

Question 16

What is the oxidation number of chlorine in Cl2O?

Answer 16

+1

Question 17

What must the sum of the oxidation numbers of all the elements in a complex ion equal?

Answer 17

The charge on the ion