WorksheetsOxidation Charges
Total questions: 27
Worksheet time: 17mins
Name
Class
Date
1.
What element's don't have oxidation numbers?
a)
alkali metals
b)
noble gases
c)
halogens
d)
alkaline earth metals
2.
The sum of all oxidation numbers in a neutral compound is ___.
a)
0
b)
1
c)
-1
d)
depends on the compound
3.
What is the oxidation number of Magnesium (Mg)?
a)
+2
b)
-2
c)
whats an oxidation number
4.
What is the oxidation number for Flourine (F)?
a)
+1
b)
-1
c)
17
d)
7
5.
Which of the following elements does NOT have an oxidation number of +2?
a)
Ca
b)
Sr
c)
K
d)
Ba
6.
What element always has an oxidation number of +1?
a)
Hydrogen
b)
Fluorine
c)
Chlorine
d)
Iodine
7.
What is the oxidation number for Be?
a)
+1
b)
+2
c)
+3
d)
+4
8.
What is oxidation number of Ca in CaCl2 ?
a)
-1
b)
-2
c)
+1
d)
+2
9.
What is oxidation number of Na in Na+ ?
a)
0
b)
+1/2
c)
+1
d)
-1
10.
What is oxidation number of Mn in MnO2 ?
a)
0
b)
+2
c)
-2
d)
+4
11.
What is the oxidation number of Fe in FeO?
a)
+1
b)
-1
c)
+2
d)
-2
12.
What is the oxidation number of O in CO2?
a)
+2
b)
-1
c)
+4
d)
-2
13.
What is the charge of an ion in group 2?
a)
+2
b)
-6
c)
-2
d)
+6
14.
What is the charge of an ion in group 3?
a)
+3
b)
-3
c)
-5
d)
+5
15.
What is the charge of an ion in group 5?
a)
+5
b)
-5
c)
+3
d)
-3
16.
What is the charge of an ion in group 6?
a)
-6
b)
+6
c)
-2
d)
+2
17.
What is the charge of an ion in group 7?
a)
+7
b)
-7
c)
+1
d)
-1
18.
What is the charge of the mercury(II) ion?
a)
+11
b)
+2
c)
-2
d)
-11
19.
What is the charge of the cobalt(IV) ion?
a)
+4
b)
-4
c)
+6
d)
+5
20.
What is the charge of the iron(III) ion?
a)
+3
b)
-3
c)
+2
d)
+1
21.
What is the charge of the nitrate?
a)
-1
b)
-3
c)
+1
d)
+3
22.
What is the charge of the dichromate?
a)
-2
b)
+2
c)
-7
d)
+14
23.
What is the charge of the sulfite?
a)
-2
b)
+2
c)
+3
d)
-3
24.
What is the charge of the yttrium(III) ion?
a)
+3
b)
-3
c)
+5
d)
-5
25.
What is the charge of ammonium?
a)
+1
b)
+4
c)
0
d)
-1
26.
How do are charges (or oxidation numbers) determined for main group elements?
a)
It is based on the number of valence electrons, which is can be found with the group number.
b)
It is based on the number of electrons, which is can be found with the atomic number.
c)
It is based on the number of protons, which is can be found with the atomic number.
d)
It is based on the number of neutrons, which is can be found with the atomic number and mass number.
27.
What is the charge for an ion in group 1?
a)
+1
b)
-7
c)
-1
d)
+7
100 %
