Which of the following lanthanide ions do not exhibit color?

Which of the actinoids is used in the treatment of cancer?

Which of the following is amphoteric?

Why do transition elements form alloys so easily?

Among d-block elements, the most abundant element belongs to the first transition state.

Which of the following tests does AgCl not answer?

Why does Zinc not show variable valency?

What is the formula of hematite?