Because there in group 2
Elements with oxidation numbers of +1 include elements in Group 1 of the periodic table, like hydrogen and sodium. Elements with oxidation numbers of -1 include elements in Group 17, like fluorine and chlorine.
those elements which can donate two electrons will possess plus two oxidation state like calcium , magnesium ,etc...
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.
Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium all have an oxidation state of plus 2.
It would have been plus seven if possible, however the maximum is the number of valence electron of sulfur to be donated, so that is clearly +6 (six!).In H2S2O7 the oxidation number is +6
Because they have one valence electrons, and if they lose this electron they attain an oxidation number of +1
Group 2 or alkaline earth metals
Elements with oxidation numbers of +1 include elements in Group 1 of the periodic table, like hydrogen and sodium. Elements with oxidation numbers of -1 include elements in Group 17, like fluorine and chlorine.
those elements which can donate two electrons will possess plus two oxidation state like calcium , magnesium ,etc...
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.
Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium all have an oxidation state of plus 2.
It would have been plus seven if possible, however the maximum is the number of valence electron of sulfur to be donated, so that is clearly +6 (six!).In H2S2O7 the oxidation number is +6
Mn increase in oxidation number from +4 to +7.
In the compound H2S, hydrogen has an oxidation number of +1, and sulfur has an oxidation number of -2.
An element with an oxidation number of +1 is typically found in group 1 of the periodic table, such as sodium (Na) or potassium (K). An element with an oxidation number of -1 is typically found in group 17 of the periodic table, such as chlorine (Cl) or fluorine (F).
Potassium's minimum oxidation number is zero.Its maximum is plus one.
-2