Electronic Configuration and Oxidation States — Prelims Questions

Which of the following actinoids exhibits a stable +4 oxidation state and has an electronic configuration of $[Rn] 5f^0 6d^2 7s^2$ in its neutral atomic state?

Which of the following statements regarding the oxidation states of actinoids is INCORRECT?

What is the electronic configuration of Curium (Cm, Z=96) in its ground state?

Which of the following ions has a stable $5f^7$ electronic configuration?

Which of the following factors is primarily responsible for the actinoids exhibiting a wide range of oxidation states?

Which of the following actinoids is known to have a stable +6 oxidation state, particularly in the form of a dioxo cation ($MO_2^{2+}$)?