Atomic number is equal to the

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

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

Which of the following compound has/have effective atomic number equal to the atomic number of a noble gas?

Which of the following compound has/have effective atomic number equal to the atomic number of a noble gas?

Which of the following compound has/have effective atomic number equal to the atomic number of a noble gas ?

Complex in which effective atomic number is not equal to atomic number of the noble gas