Since the SO4-2 ions have two negative charges and oxygen atoms in almost all compounds have two negative charges each, the sulfur atoms have an oxidation number of -2 -4(-2) = +6.
+2 for Ca, +6 for S and -2 for each O
The oxidation number of Calcium (Ca) is +2
Oxygen atoms are generally considered to have an oxidation number of -2 in all oxyanions such as sulfate.
+3 for Al and -2 for O is the oxidation number for Al2O3.
+6: Oxygen in oxyanions is assumed to have an oxidation state of -2; there are four such oxygen atoms, for a total of -8, and the SO4 anion has a charge of -2. This means that the sulfur atom must have an oxidation state of +6, because +6 added to - 8 = -2.
Chromium is a useful element. It shows +2 in this compound.
The oxidation number of Calcium (Ca) is +2
Oxygen atoms are generally considered to have an oxidation number of -2 in all oxyanions such as sulfate.
+3 for Al and -2 for O is the oxidation number for Al2O3.
+6: Oxygen in oxyanions is assumed to have an oxidation state of -2; there are four such oxygen atoms, for a total of -8, and the SO4 anion has a charge of -2. This means that the sulfur atom must have an oxidation state of +6, because +6 added to - 8 = -2.
Chromium is a useful element. It shows +2 in this compound.
+4 oxygen has an oxidation of -2, so do 3 times -2=-6, i believe Ca is a +2 and you must get the numbers to equal 0. so the answer is a +4
This should be SO4-2 ion. sulfur shows +6 in this ion.
This should be SO4-2 ion. sulfur shows +6 in this ion.
Aluminium is a light metal. Al shows +3 in aluminium sulfate.
Oxidation number is plus two. It is common to every ion of Ca.
The only oxidation number is 2+.
-1 for Carbon (in carbide) and +2 for Ca