Option (d) is the answer.
According to Mendeleev’s periodic law, the elements were arranged in the periodic table in the order of: (a) Decreasing atomic numbers (b) Increasing atomic numbers (c) Decreasing atomic masses (d) Increasing atomic masses
According to Mendeleev’s periodic law, the elements were arranged in the periodic table in the order of: (a) Decreasing atomic numbers (b) Increasing atomic numbers (c) Decreasing atomic masses (d) Increasing atomic masses