Question

State Mendeleev's periodic law.

Answer 1

• It was found that most of the elements occupied places in the table in order of their increasing atomic masses.
• In 1869, Mendeleev formulated a law, now known as the periodic law.
• The law is stated as follows:
  The properties of elements are periodic functions of their atomic masses.
• This means, that if the elements are arranged in order of increasing atomic masses then those elements with similar properties are repeated at regular intervals.