In lanthanides, Ce changes from +4 to +3 oxidation state.

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

Sc3+ is a paramagnetic ion.

Choose the correct statement.

Which of the following lanthanide ions do not exhibit color?

Which is the most stable oxidation state of actinoids?

Which of the following is amphoteric?

Why do transition elements form alloys so easily?