![]() ![]() Neutron was discovered by Chadwick by bombarding Be or B atoms with α-rays.Ītomic number (Z) = number of protons in the nucleus of an atom = number of electrons in a neutral atom Proton was discovered by Goldstein from study of anode rays using a perforated cathode in the discharge tube. Refer to the points below:Ītom is made up of electrons, protons and neutrons called fundamental particles.Įlectron was discovered by J. We have provided a few important points that are covered in NCERT Class 12 Maths Chapter 7 Integrals to help students in their exam preparations. ![]() Students can download and use the NCERT notes for Class 11 Chemistry Chapter 2 PDF file from this article. It helps students achieve good grades not only in Year 11 GCSE but also in competitive exams such as JEE Main, BITSAT, NEET and more. These NCERT notes are designed according to the latest CBSE guidelines and provide students with comprehensive answers to all questions in the NCERT Class 11 Chemistry Textbook. ![]() The Atom structure is an important chapter for students preparing for their 11th grade exams. ![]()
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