Chemistry MCQs for Class 11 Chapter 2 Structure of Atom
Q.1. Number of protons, neutrons and electrons in the element 89X231 is(a) 89, 89, 242 (b) 89, 142, 89(c) 89, 71, 89 (d) 89, 231, 89 Answer (b) Number of p = number of e– = 89 and neutrons 231 – 89 = 142. Q.2. Atoms with same mass number but different atomic numbers are … Read more
