Question

Assertion :According to Mendeleev, periodic properties of elements are the function

of their atomic masses.

Reason : Atomic number is equal to the number of protons.

a)Both assertion and reason are true and reason is the correct explanation of assertion.

b)Both assertion and reason are true but reason is not the correct explanation of

assertion.

c)Assertion is true but reason is false.​

Answer 1

Answer:

According to Mendeleev, periodic properties of elements are periodic functions of their atomic weight. According to Moseley's periodic law, periodic properties of elements are periodic functions of their atomic number. Hence, the Assertion is incorrect. Atomic number is equal to the number of protons.