CBSE Class 9 > Class 9 Notes > Science > Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom
Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom
| Download, print and study this document offline |
Please wait while the PDF view is loading
Page 1 4. Structur e of A t om V e r y S h o r t A n s w e r T y p e Q u e s t i o n s - P g - 1 9 1 1 . Q u e s t i o n Which subatomic particle is not present in an ordinary hydrogen atom? A n s w e r The subatomic particle is not present in an ordinary hydrogen atom is neutron. 2 . Q u e s t i o n Name the scientists who described the arrangement of electrons in an atom. A n s w e r The scientists who described the arrangement of electrons in an atom was J.J. Thomson 3 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the K shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the K shell of an atom is 2. 4 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the L shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the L shell of an atom is 8. 5 . Q u e s t i o n What is the maximum number of electrons an M shell of the atom can accommodate? A n s w e r Page 2 4. Structur e of A t om V e r y S h o r t A n s w e r T y p e Q u e s t i o n s - P g - 1 9 1 1 . Q u e s t i o n Which subatomic particle is not present in an ordinary hydrogen atom? A n s w e r The subatomic particle is not present in an ordinary hydrogen atom is neutron. 2 . Q u e s t i o n Name the scientists who described the arrangement of electrons in an atom. A n s w e r The scientists who described the arrangement of electrons in an atom was J.J. Thomson 3 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the K shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the K shell of an atom is 2. 4 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the L shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the L shell of an atom is 8. 5 . Q u e s t i o n What is the maximum number of electrons an M shell of the atom can accommodate? A n s w e r The maximum number of electrons an M shell of the atom can accommodate is 18. 6 . Q u e s t i o n What is the maximum number of electrons that can go into the N shell of an atom? A n s w e r The maximum number of electrons that can go into the N shell of an atom is 32. 7 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the: (a) innermost shell of an atom? (b) outermost shell of an atom? A n s w e r (a) The maximum number of electrons which can be accommodated in the innermost shell of an atom is 2. (b) The maximum number of electrons which can be accommodated in the outermost shell of an atom is 8. 8 . Q u e s t i o n Name the three subatomic particles present in an atom. A n s w e r The three subatomic particles present in an atom are electron, proton and neutron. 9 . Q u e s t i o n Name the negatively charged particle present in the atoms of all the elements. A n s w e r The negatively charged particle present in the atoms of all the elements is electron. 1 0 . Q u e s t i o n Name the scientist who discovered electron. A n s w e r Page 3 4. Structur e of A t om V e r y S h o r t A n s w e r T y p e Q u e s t i o n s - P g - 1 9 1 1 . Q u e s t i o n Which subatomic particle is not present in an ordinary hydrogen atom? A n s w e r The subatomic particle is not present in an ordinary hydrogen atom is neutron. 2 . Q u e s t i o n Name the scientists who described the arrangement of electrons in an atom. A n s w e r The scientists who described the arrangement of electrons in an atom was J.J. Thomson 3 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the K shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the K shell of an atom is 2. 4 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the L shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the L shell of an atom is 8. 5 . Q u e s t i o n What is the maximum number of electrons an M shell of the atom can accommodate? A n s w e r The maximum number of electrons an M shell of the atom can accommodate is 18. 6 . Q u e s t i o n What is the maximum number of electrons that can go into the N shell of an atom? A n s w e r The maximum number of electrons that can go into the N shell of an atom is 32. 7 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the: (a) innermost shell of an atom? (b) outermost shell of an atom? A n s w e r (a) The maximum number of electrons which can be accommodated in the innermost shell of an atom is 2. (b) The maximum number of electrons which can be accommodated in the outermost shell of an atom is 8. 8 . Q u e s t i o n Name the three subatomic particles present in an atom. A n s w e r The three subatomic particles present in an atom are electron, proton and neutron. 9 . Q u e s t i o n Name the negatively charged particle present in the atoms of all the elements. A n s w e r The negatively charged particle present in the atoms of all the elements is electron. 1 0 . Q u e s t i o n Name the scientist who discovered electron. A n s w e r J.J. Thomson was the scientist who discovered electrons. 1 1 . Q u e s t i o n What is the usual symbol for (a) an electron (b) a proton, and (c) a neutron? A n s w e r e - , p + , n are the usual symbol for electron proton and neutron respectively. 1 2 . Q u e s t i o n State whether the following statements are true or false: (a) Thomson proposed that the nucleus of an atom contains protons and neutrons. (b) The cathode rays obtained from all the gases consist of negatively charged particles called electrons. (c) The anode rays obtained from all the gases consist of positively charged particles called protons. A n s w e r (a) False, this statement is not true. (b) True. Yes, the cathode rays obtained from all the gases consist of negatively charged particles called electrons. (c) False, The anode rays obtained from all the gases consist of positively charged particles called protons is not a true statement. 1 3 . Q u e s t i o n Name the central part of an atom where protons and neutrons are held together. A n s w e r The central part of an atom where protons and neutrons are held together is nucleus. 1 4 . Q u e s t i o n What are the various letters used by Bohr to represent electron shells in an atom? A n s w e r The various letters used by Bohr to represent electron shells in an atom are K, L, M and N. 1 5 . Q u e s t i o n Page 4 4. Structur e of A t om V e r y S h o r t A n s w e r T y p e Q u e s t i o n s - P g - 1 9 1 1 . Q u e s t i o n Which subatomic particle is not present in an ordinary hydrogen atom? A n s w e r The subatomic particle is not present in an ordinary hydrogen atom is neutron. 2 . Q u e s t i o n Name the scientists who described the arrangement of electrons in an atom. A n s w e r The scientists who described the arrangement of electrons in an atom was J.J. Thomson 3 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the K shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the K shell of an atom is 2. 4 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the L shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the L shell of an atom is 8. 5 . Q u e s t i o n What is the maximum number of electrons an M shell of the atom can accommodate? A n s w e r The maximum number of electrons an M shell of the atom can accommodate is 18. 6 . Q u e s t i o n What is the maximum number of electrons that can go into the N shell of an atom? A n s w e r The maximum number of electrons that can go into the N shell of an atom is 32. 7 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the: (a) innermost shell of an atom? (b) outermost shell of an atom? A n s w e r (a) The maximum number of electrons which can be accommodated in the innermost shell of an atom is 2. (b) The maximum number of electrons which can be accommodated in the outermost shell of an atom is 8. 8 . Q u e s t i o n Name the three subatomic particles present in an atom. A n s w e r The three subatomic particles present in an atom are electron, proton and neutron. 9 . Q u e s t i o n Name the negatively charged particle present in the atoms of all the elements. A n s w e r The negatively charged particle present in the atoms of all the elements is electron. 1 0 . Q u e s t i o n Name the scientist who discovered electron. A n s w e r J.J. Thomson was the scientist who discovered electrons. 1 1 . Q u e s t i o n What is the usual symbol for (a) an electron (b) a proton, and (c) a neutron? A n s w e r e - , p + , n are the usual symbol for electron proton and neutron respectively. 1 2 . Q u e s t i o n State whether the following statements are true or false: (a) Thomson proposed that the nucleus of an atom contains protons and neutrons. (b) The cathode rays obtained from all the gases consist of negatively charged particles called electrons. (c) The anode rays obtained from all the gases consist of positively charged particles called protons. A n s w e r (a) False, this statement is not true. (b) True. Yes, the cathode rays obtained from all the gases consist of negatively charged particles called electrons. (c) False, The anode rays obtained from all the gases consist of positively charged particles called protons is not a true statement. 1 3 . Q u e s t i o n Name the central part of an atom where protons and neutrons are held together. A n s w e r The central part of an atom where protons and neutrons are held together is nucleus. 1 4 . Q u e s t i o n What are the various letters used by Bohr to represent electron shells in an atom? A n s w e r The various letters used by Bohr to represent electron shells in an atom are K, L, M and N. 1 5 . Q u e s t i o n Name the particles which actually determine the mass of an atom. A n s w e r The particles which actually determine the mass of an atom is proton. 1 6 . Q u e s t i o n Name the positively charged particle present in the atoms of all the elements. A n s w e r The positively charged particle present in the atoms of all the elements are protons. 1 7 . Q u e s t i o n What is the electronic con iguration of a hydrogen atom? A n s w e r The electronic con iguration of a hydrogen atom is 1. 1 8 . Q u e s t i o n How many times is a proton heavier than an electron? A n s w e r A proton is 1840 times heavier than an electron. 1 9 . Q u e s t i o n Name the gas which produces anode rays consisting of protons in the discharge tube experiment. A n s w e r The gas which produces anode rays consisting of protons in the discharge tube experiment was hydrogen. 2 0 . Q u e s t i o n Which part of an atom was discovered by Rutherford’s alpha particle scattering experiment? A n s w e r The part of an atom was discovered by Rutherford’s alpha particle scattering experiment was nucleus. 2 1 . Q u e s t i o n What is the positive charge on the nucleus of an atom due to? A n s w e r Page 5 4. Structur e of A t om V e r y S h o r t A n s w e r T y p e Q u e s t i o n s - P g - 1 9 1 1 . Q u e s t i o n Which subatomic particle is not present in an ordinary hydrogen atom? A n s w e r The subatomic particle is not present in an ordinary hydrogen atom is neutron. 2 . Q u e s t i o n Name the scientists who described the arrangement of electrons in an atom. A n s w e r The scientists who described the arrangement of electrons in an atom was J.J. Thomson 3 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the K shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the K shell of an atom is 2. 4 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the L shell of an atom? A n s w e r The maximum number of electrons which can be accommodated in the L shell of an atom is 8. 5 . Q u e s t i o n What is the maximum number of electrons an M shell of the atom can accommodate? A n s w e r The maximum number of electrons an M shell of the atom can accommodate is 18. 6 . Q u e s t i o n What is the maximum number of electrons that can go into the N shell of an atom? A n s w e r The maximum number of electrons that can go into the N shell of an atom is 32. 7 . Q u e s t i o n What is the maximum number of electrons which can be accommodated in the: (a) innermost shell of an atom? (b) outermost shell of an atom? A n s w e r (a) The maximum number of electrons which can be accommodated in the innermost shell of an atom is 2. (b) The maximum number of electrons which can be accommodated in the outermost shell of an atom is 8. 8 . Q u e s t i o n Name the three subatomic particles present in an atom. A n s w e r The three subatomic particles present in an atom are electron, proton and neutron. 9 . Q u e s t i o n Name the negatively charged particle present in the atoms of all the elements. A n s w e r The negatively charged particle present in the atoms of all the elements is electron. 1 0 . Q u e s t i o n Name the scientist who discovered electron. A n s w e r J.J. Thomson was the scientist who discovered electrons. 1 1 . Q u e s t i o n What is the usual symbol for (a) an electron (b) a proton, and (c) a neutron? A n s w e r e - , p + , n are the usual symbol for electron proton and neutron respectively. 1 2 . Q u e s t i o n State whether the following statements are true or false: (a) Thomson proposed that the nucleus of an atom contains protons and neutrons. (b) The cathode rays obtained from all the gases consist of negatively charged particles called electrons. (c) The anode rays obtained from all the gases consist of positively charged particles called protons. A n s w e r (a) False, this statement is not true. (b) True. Yes, the cathode rays obtained from all the gases consist of negatively charged particles called electrons. (c) False, The anode rays obtained from all the gases consist of positively charged particles called protons is not a true statement. 1 3 . Q u e s t i o n Name the central part of an atom where protons and neutrons are held together. A n s w e r The central part of an atom where protons and neutrons are held together is nucleus. 1 4 . Q u e s t i o n What are the various letters used by Bohr to represent electron shells in an atom? A n s w e r The various letters used by Bohr to represent electron shells in an atom are K, L, M and N. 1 5 . Q u e s t i o n Name the particles which actually determine the mass of an atom. A n s w e r The particles which actually determine the mass of an atom is proton. 1 6 . Q u e s t i o n Name the positively charged particle present in the atoms of all the elements. A n s w e r The positively charged particle present in the atoms of all the elements are protons. 1 7 . Q u e s t i o n What is the electronic con iguration of a hydrogen atom? A n s w e r The electronic con iguration of a hydrogen atom is 1. 1 8 . Q u e s t i o n How many times is a proton heavier than an electron? A n s w e r A proton is 1840 times heavier than an electron. 1 9 . Q u e s t i o n Name the gas which produces anode rays consisting of protons in the discharge tube experiment. A n s w e r The gas which produces anode rays consisting of protons in the discharge tube experiment was hydrogen. 2 0 . Q u e s t i o n Which part of an atom was discovered by Rutherford’s alpha particle scattering experiment? A n s w e r The part of an atom was discovered by Rutherford’s alpha particle scattering experiment was nucleus. 2 1 . Q u e s t i o n What is the positive charge on the nucleus of an atom due to? A n s w e r The positive charge on the nucleus of an atom is due to the presence of protons. 2 2 . Q u e s t i o n State the number of electrons present in the outermost shell of the atom of the following elements: (i) Neon (ii) Chlorine A n s w e r (i) In neon the number of electrons present in the outermost shell of the atom is 8. (ii) Chlorine the number of electrons present in the outermost shell of the atom is 7. 2 3 . Q u e s t i o n Which shell of an atom can accommodate a maximum of: (a) 8 electrons? (b) Chlorine A n s w e r (a) 8 electrons can be accommodated in L shell. (b) 32 electrons can be accommodated in N shell. 2 4 . Q u e s t i o n Name the shell of an atom which can accommodate a maximum of: (a) 2 electrons (b) 18 electrons A n s w e r (a) the shell of an atom which can accommodate a maximum of 2 electrons is L. (b) the shell of an atom which can accommodate a maximum of 18 electrons is M. 2 5 . Q u e s t i o n Which subatomic particle whose relative charge is: (i) Chadwick? (ii) Thomson?Read More
FAQs on Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom
| 1. What is the basic structure of an atom? |  |
Ans. An atom consists of three primary particles: protons, neutrons, and electrons. Protons and neutrons are located in the nucleus at the center of the atom, while electrons orbit around the nucleus in various energy levels or shells. Protons carry a positive charge, neutrons have no charge, and electrons carry a negative charge. The number of protons in the nucleus determines the atomic number and the identity of the element.
| 2. Who proposed the nuclear model of the atom, and what are its key features? | |
Ans. The nuclear model of the atom was proposed by Ernest Rutherford in 1911. This model introduced the concept of a dense nucleus made up of protons and neutrons at the center of the atom, surrounded by a cloud of electrons. Key features include the realization that most of the atom is empty space, with the majority of its mass concentrated in the nucleus, and that the electrons occupy specific energy levels around the nucleus.
| 3. What is the significance of the Bohr model in understanding atomic structure? | |
Ans. The Bohr model, proposed by Niels Bohr in 1913, is significant because it introduced the idea of quantized energy levels for electrons in an atom. According to this model, electrons can only occupy specific energy levels and can jump between these levels by absorbing or emitting energy in the form of photons. This model explained the spectral lines of hydrogen and laid the groundwork for modern quantum mechanics.
| 4. How do isotopes differ from each other, and why are they important? | |
Ans. Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons, resulting in different mass numbers. For example, ¹²C and ¹³C are isotopes of carbon. Isotopes are important because they can have different physical and chemical properties, and some are radioactive, making them useful in applications such as medical imaging, dating archaeological finds, and tracing chemical pathways in biological systems.
| 5. What are the limitations of the Rutherford model of the atom? | |
Ans. The Rutherford model has several limitations, including the inability to explain the stability of atoms and the discrete energy levels of electrons. It could not account for why electrons do not spiral into the nucleus due to electromagnetic attraction. Additionally, it failed to explain the observed spectra of atoms, leading to the development of the Bohr model and later quantum mechanical models that provide a more accurate description of atomic structure.
About this Document
4.76/5 Rating
Apr 22, 2026 Last updated
Document Description: Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom for Class 9 2026 is part of Science Class 9 preparation. The notes and questions for Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom have been prepared according to the Class 9 exam syllabus. Information about Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom covers topics like and Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom Example, for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom.
Introduction of Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom in English is available as part of our Science Class 9 for Class 9 & Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom in Hindi for Science Class 9 course. Download more important topics related with notes, lectures and mock test series for Class 9 Exam by signing up for free. Class 9: Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom
Description
Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom of Science Class 9 on EduRev - covers important questions, MCQs with answers. Helps you prepare for exam.
Information about Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom
In this doc you can find the meaning of Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom defined & explained in the simplest way possible. Besides explaining types of Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom theory, EduRev gives you an ample number of questions to practice Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom tests, examples and also practice Class 9 tests
Related Searches
Free, ppt, Viva Questions, Objective type Questions, Important questions, study material, Summary, Semester Notes, mock tests for examination, Exam, Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom, video lectures, shortcuts and tricks, Sample Paper, practice quizzes, Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom, Extra Questions, MCQs, past year papers, Previous Year Questions with Solutions, pdf , Lakhmir Singh & Manjit Kaur Solutions: Structure of the Atom;