
Oxidation Numbers of Elements
Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard

Emma Peterson
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of a free element like iron?
Zero
One
Three
Two
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the oxidation number of a free element zero?
Because it has a positive charge
Because it is in a compound
Because there is no exchange of electrons
Because it is bonded to other elements
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In FeCl2, what is the oxidation number of chlorine?
-1
+2
+1
0
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you determine the oxidation number of iron in FeCl2?
By knowing it is a free element
By looking at the charge of the compound
By assuming it is always +3
By considering the oxidation number of chlorine
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of iron in FeCl2?
0
+3
+2
+1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In FeCl3, what is the total oxidation number of the chlorine atoms?
-1
0
-2
-3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of iron in FeCl3?
+1
+2
+3
0
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