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

Which is the most stable oxidation state of actinoids?

Why does Zinc not show variable valency?

Which metal is used as an electroplated protective coating?

Which of the following has the highest atomic number?

Why is there an increase in the atomic radius of transition elements at the end of the period?

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

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