Question

According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of: ______ 

Options

• increasing atomic number

• decreasing atomic number

• increasing atomic masses

• decreasing atomic masses

Answer 1

According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of increasing atomic masses.

Explanation:

According to Mendeleev's periodic law, the elements in the periodic table were arranged in the order of increasing atomic masses.