Assertion(A): All isotopes of a given element show the same type of chemical behaviour. Reason(R) The chemical properties of an atom are controlled by the number of electron s in the atom. Assertion(A): All isotopes of a given element show the same type of chemical behaviour. Reason(R) The chemical properties of an atom are controlled by the number of electron s in the atom. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related