Question

According to Mendeléev's Periodic Law, the elements were arranged in the periodic table in the order of

विकल्प

•  increasing atomic number

•  decreasing atomic number

• increasing atomic masses

• decreasing atomic masses

Answer 1

increasing atomic masses

Explanation - 

According to Mendeléev's Periodic Law, the elements were arranged in the periodic table in the order of their increasing atomic mass.