
Oxidation States and Numbers

Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard

Aiden Montgomery
FREE Resource
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of a neutral element like sodium (Na) when it is not combined with other elements?
Zero
Two
One
Three
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to remember the oxidation state of free elements when balancing redox reactions?
Because they always have a positive charge
Because they have an oxidation state of zero
Because they are always oxidized
Because they are always reduced
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of Fe3+ ion?
+3
0
+2
+1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following compounds has an oxidation state that is not zero?
S
H2O
Fe
Na
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the compound NaCl, what is the oxidation state of sodium (Na)?
+2
-1
+1
0
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What must you do to determine the oxidation states of elements in compounds like SO3?
Consult a periodic table
Guess based on appearance
Assume they are zero
Use specific rules
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