Which of the following lanthanide ions do not exhibit color?

Which of the following is not a consequence of lanthanide contraction?

What is the first element of the fourth transition series in the periodic table?

Which of the following has the highest atomic number?

What type of bond do the transition elements form with themselves?

What is the general electronic configuration of the lanthanides?

Which metal is used as an electroplated protective coating?

Which of the actinoids is used as a nuclear fuel?