Chemistry - f-block Question with Solution | TestHub

${}_{89}\mathrm{Ac}=[\mathrm{Rn}]6d^1,7s^2$ Oxidation state $=+3$ ${}_{90}\mathrm{Th}=[\mathrm{Rn}]6d^2,7s^2$ Oxidation states $=+3,+4$ ${}_{91}\mathrm{Pa}=[\mathrm{Rn}]6d^3,7s^2$ Oxidation states $=+3,+4,+5$ ${}_{92}\mathrm{U}=[\mathrm{Rn}]6d^4,7s^2$ Oxidation states $=+3,+4,+5,+6$