Assertion (A): According to Mendeleeff, periodic properties of elements is a function of their atomic masses.
Assertion (R): Atomic number is equal to number of protons

Assertion: According to Mendeleeff, periodic properties of elements is a function of their atomic masses. Reason : Atomic number is equal to number of protons

"The properties of elements are the periodic functions of their atomic masses"

According to lother meyer, the physical properties of the elements are periodic functions of their atomic number.

In the modern periodic table, properties of the elements are a periodic function of their atomic numbers. True/False

State whether the following statements are true or false: (a) Newlands divided the elements into horizontal row of eight element each. (b) According to Mendeleev's periodic law, the properties of elements are a periodic function of their atomic numbers. (c) The elements in a group have consecutive atomic numbers.

Assertion:Atomic number is a more fundamental property of an element than its atomic mass. Reason:Atomic number is equal to number of protons in an atom.