Question 206
In the first transition series, which element commonly shows only the +2 and +3 oxidation states?
Question 207
Which of the following elements shows the highest number of oxidation states?
Question 208
What is the electronic configuration of Th⁴⁺?
Question 209
What is the electronic configuration of Pm³⁺?
Question 210
What is the electronic configuration of Mn²⁺?