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because they are stable
why do alkali metels not show +2 oxidation state
Never. iron shows either +2 or +3 oxidation state but in Fe3O4 its oxidation state is seems to +4 but it is actually mixture of one moles FeO and one mole Fe2O3 , (FeO.Fe2O3 = Fe3O4).
Ruthenium and Osmium both show the oxidation state of +8, which is highest known for any single metal ion.
Because they have only one electron in their valency shell. The second oxidation state would require the atom to lose an electron from its penultimate shell which is full.
When halogens bind to more electropositive elements (compared it itself), they show -1 oxidation state. When halogens bind to more electronegative elements (compared it itself), they show +1 oxidation state.
because they are stable
why do alkali metels not show +2 oxidation state
Due to the comparable energies of ns and the (n-1)d orbitals, the d-electrons also take part in the reactions.
It is rarely, but manganese can show the valence 5+.
Never. iron shows either +2 or +3 oxidation state but in Fe3O4 its oxidation state is seems to +4 but it is actually mixture of one moles FeO and one mole Fe2O3 , (FeO.Fe2O3 = Fe3O4).
All are radioactive and all of them can show the oxidation state of +3
Ruthenium and Osmium both show the oxidation state of +8, which is highest known for any single metal ion.
The group I-A and III-A group have both positive and negative oxidation state . In I-A group H (hydrogen) has negative oxidation state and positive oxidation state.In III-A group B(boron) performs both positive and negative oxidation states. RGUKT IIIT NUZVID: N091528
Potassium and Lithium
Because they have only one electron in their valency shell. The second oxidation state would require the atom to lose an electron from its penultimate shell which is full.
They show the oxidation an reduction halves of a reaction