Question

1. Write short notes.
a. Mendeleev's periodic law.​

Answer 1

Answer:

According to Mendeleev's Periodic Law, the chemical and physical properties of elements are a periodic function of their atomic weights.

Answer 2

Answer:

The Mendeleev's periodic law states that " The properties are a periodic function of their atomic mass." by using the atomic mass as the concept periodic classification of elements can be arranged in a groups.

Explanation:Mendeleev arranged the elements according to their properties and in order of increasing atomic weights.

⇒ In the Mendeleev’s periodic table, vertical columns are called groups and horizontal rows are called periods.

⇒ Atomic masses of some elements were rediscovered so as to give them proper place in the periodic table.

⇒ Mendeleev kept vacant places in the periodic table for elements not discovered till then.