Why is+2oxidiation state of lead more stable than +4 oxidation state?

Explain, why is the +2 oxidation state of lead more stable than the +2 oxidation state of tin.

Account for the following: The +2 oxidation state of lead is more stable than +2 oxidation state of Tin.

Manganese in the +2 oxidation state is more stable than +3 oxidation state where as iron is stable at +3 oxidation state than +2 oxidation state. Explain why

Why is + 4 oxidation state of titanium more stable than its +3 state? (Z = 22)

The +1 oxidation state is more stable than +3 oxidation state for thallium. Give reason.

The +1 oxidation state is more stable than +3 oxidation state for thallium. Give reason.

The +1 oxidation state is more stable than +3 oxidation state for thallium. Give reason.