Question

What was the basis for Mendeleev's periodic law?

Answer 1

Mendeleev's periodic law: The chemical and physical properties of elements are a periodic function of their atomic masses.

Mendeleev's periodic table:

• A tabular arrangement of the elements based on the periodic law is called the periodic table.
• Mendeleev believed that the atomic mass of elements was the most fundamental property and arranged them in increasing order in horizontal rows till he encountered an element which had properties similar to the first element.
• He placed this element below the first element and thus started the second row of elements. Proceeding in this manner he could arrange all the known elements according to their properties and thus created the first periodic table.