Group 2 or alkaline earth metals
Elements in group 2 have an oxidation number of +2 because they readily lose two electrons to achieve a full outer shell, which is the most stable electron configuration. This results in a +2 oxidation state as they become positively charged cations.
Group 1 or alkali metals (+1 oxidation number). Group 2 or alkaline earth metals (+2 oxidation number).
Group 1 elements have an oxidation number of +1, group 2 elements have an oxidation number of +2, group 17 elements have an oxidation number of -1, and group 18 elements (noble gases) have zero oxidation number since they are chemically unreactive.
In KMnO4, Mn has an oxidation number of +7, KNO2 has N with an oxidation number of +3, and H2SO4 has S with an oxidation number of +6. In MnSO4, Mn has an oxidation number of +2, H2O has O with an oxidation number of -2, KNO3 has N with an oxidation number of +5, and K2SO4 has S with an oxidation number of +6.
Elements that have a single oxidation number include group 1 elements (e.g. sodium, potassium) which have an oxidation number of +1, and group 2 elements (e.g. magnesium, calcium) which have an oxidation number of +2.
It can be a any group. Generally they shows +2 in group 2.
The oxidation number for group 2 elements is typically +2. These elements have 2 valence electrons that they can lose to form a 2+ cation.
-2
In the compound H2S, hydrogen has an oxidation number of +1, and sulfur has an oxidation number of -2.
Magnesium is in the group 2. 0 is the lowest oxidation number for it.
Hydrogen has -1 and +1 oxidation numbers. Other elements have +1 only
oxidation number of S is +6.It oxidize into SO4 ^-2