Assertion: Manganese shows a number of oxidation states.
Reason: The difference of energy between 3d and 4s subshells is large.

In 3d-series,manganese shows maximum number of oxidation states.

Actinoids show, a large number of oxidation states Why?

Assertion : Lanthanoids show a limited number of oxidation states whereas actinoids show a large number of oxidation states. Reason : Energy gap between 4f, 5d and 6s subshells is small whereas that between 5f. 6d and 7s subshells is large.

Assertion : Lanthanoids show a limited of ixidation states wheres actanoids show a large number of oxidation states. Reason : Energy gap between 4f, 5d and 6s subshells is small wheras that between 5f, 6d and 7s subshell is large.

How does manganese show its variable oxidation states?

Assertion : Manganese show a maximum oxidation state of + 5 . Reason : Manganese has 5 electrons in the 3d subshell.

Manganese exhibits highest oxidation state of +7. Give reason.

Assertion : Lanthanoids show a limited number of oxidation states, whereas actinoids show a large number of oxidation states Reason : Actinoid contraction is grater from element to element due to poor shielding of 5f- orbitals