Which is the most stable oxidation state of actinoids?

Which of the following metal does not form a coloured salt?

Which of the following has the highest density?

Which of the following element belongs to the first transition series of the periodic table?

How many series’ of transition elements are present in the periodic table?

What is the end product formed when KMnO4 reacts with HCl?

Which of the following statements is incorrect?

Which of the following iswhy the atomic radii of the second and third transition series are almost same?