Elements in group 2 mostly takes the oxidation number +II.
+2
The most common negative oxidation state in Group 13 elements is -3. This is particularly seen in compounds where these elements form three bonds with more electronegative species.
the most common oxidation state of chlorine is -1.
Most common oxidation state of Gold is 0, because its most common form is its elementary form.
Oxygen is the element whose most common oxidation state is -2. In fact, it only shows oxidation states of +2,+1 in compounds OF2, O2F2. It is because oxygen is the second most electronegative element behind Fluorine.
There are no such metals whose common oxidation state is -2
The oxidation state is 1.
Mercury's most common oxidation state is +2
the most common oxidation number for oxygen is -2.
The most common are 0 and 3+.
+4 is the most common
The most common oxidation state of -2 would be Oxygen.