Chemical Formulas and Oxidation Numbers Review
Interactive Video
•
Science
•
6th - 10th Grade
•
Practice Problem
•
Hard
Liam Anderson
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an element composed of?
Multiple types of atoms
A mixture of compounds
One type of atom
Two or more different elements
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a correct definition of a compound?
A substance composed of one type of atom
A mixture of different substances
A substance that can be broken down into simpler substances by chemical means
A pure substance composed of two or more different elements chemically combined in a fixed proportion
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a chemical formula tell us?
The physical state of a compound
The taste of a compound
The number and kind of atoms in a compound
The color of a compound
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a molecular formula?
Fe2O3
CaCO3
SO2
NaCl
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula for C8H10N4O2?
C4H5N2O
C8H10N4O2
CH2N
C2H5N
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of an atom in a free element?
+2
-1
+1
0
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In most compounds, what is the oxidation number of oxygen?
-1
+1
+2
-2
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