{"id":4130,"date":"2016-05-06T11:49:00","date_gmt":"2016-05-06T11:49:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/"},"modified":"2018-06-07T16:43:01","modified_gmt":"2018-06-07T11:13:01","slug":"ncert-solutions-for-class-9-science-structure-of-the-atom-part-1","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/","title":{"rendered":"NCERT Solutions for Class 9 Science Structure of the Atom part 1"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#NCERT_Class_9_Science_Chapter_wise_Solutions\" >NCERT Class 9 Science Chapter wise Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#NCERT_Solutions_for_Class_9_Science_Structure_of_the_Atom_part_1\" >NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#1_What_are_canal_rays\" >1. What are canal rays?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#2_If_an_atom_contains_one_electron_and_one_proton_will_it_carry_any_charge_or_not\" >2. If an atom contains one electron and one proton, will it carry any charge or not?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#1_On_the_basis_of_Thomsons_model_of_an_atom_explain_how_the_atom_is_neutral_as_a_whole\" >1. On the basis of Thomson\u2019s model of an atom, explain how the atom is neutral as a whole.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#2_On_the_basis_of_Rutherfords_model_of_an_atom_which_subatomic_particle_is_present_in_the_nucleus_of_an_atom\" >2. On the basis of Rutherford\u2019s model of an atom, which subatomic particle is present in the nucleus of an atom?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#3_Draw_a_sketch_of_Bohrs_model_of_an_atom_with_three_shells\" >3. Draw a sketch of Bohr\u2019s model of an atom with three shells.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#4_What_do_you_think_would_be_the_observation_if_the_%CE%B1-particle_scattering_experiment_is_carried_out_using_a_foil_of_a_metal_other_than_gold\" >4. What do you think would be the observation if the \u03b1-particle scattering experiment is carried out using a foil of a metal other than gold?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#5_Name_the_three_sub-atomic_particles_of_an_atom\" >5. Name the three sub-atomic particles of an atom.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#6_Helium_atom_has_an_atomic_mass_of_4_u_and_two_protons_in_its_nucleus_How_many_neutrons_does_it_have\" >6. Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#1_Write_the_distribution_of_electrons_in_carbon_and_sodium_atoms\" >1. Write the distribution of electrons in carbon and sodium atoms.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#2_If_K_and_L_shells_of_an_atom_are_full_then_what_would_be_the_total_number_of_electrons_in_the_atom\" >2. If K and L shells of an atom are full, then what would be the total number of electrons in the atom?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#1_How_will_you_find_the_valency_of_chlorine_sulphur_and_magnesium\" >1. How will you find the valency of chlorine, sulphur and magnesium?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#2_If_number_of_electrons_in_an_atom_is_8_and_number_of_protons_is_also_8_then\" >2. If number of electrons in an atom is 8 and number of protons is also 8, then<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#3_With_the_help_of_Table_41_find_out_the_mass_number_of_oxygen_and_sulphur_atom\" >3. With the help of Table 4.1, find out the mass number of oxygen and sulphur atom.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#1_For_the_symbol_HD_and_T_tabulate_three_sub-atomic_particles_found_in_each_of_them\" >1. For the symbol H,D and T tabulate three sub-atomic particles found in each of them.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#2_Write_the_electronic_configuration_of_any_one_pair_of_isotopes_and_isobars\" >2. Write the electronic configuration of any one pair of isotopes and isobars.<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#NCERT_Solutions_for_Class_9_Science\" >NCERT Solutions for Class 9 Science<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/#CBSE_app_for_Class_9\" >CBSE app for Class 9<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions for Class 9 Science Structure of the Atom part 1 Class 9 Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 9 Science chapter wise NCERT solution for Science Book for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_9_Science_Chapter_wise_Solutions\"><\/span>NCERT Class 9 Science Chapter wise Solutions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>01 \u2013 \u00a0Matter in Our Surroundings<\/li>\n<li>02 \u2013 Is Mattter Around us Pure<\/li>\n<li>03 \u2013 Atoms and Molecules<\/li>\n<li>04 \u2013 Structure of the Atom<\/li>\n<li>05 \u2013 The Fundamental Unit of Life<\/li>\n<li>06 \u2013 Tissues<\/li>\n<li>07 \u2013 Diversity in Living Organisms<\/li>\n<li>08 \u2013 Motion<\/li>\n<li>09 \u2013 Force and Laws of Motion<\/li>\n<li>10 \u2013 Gravitation<\/li>\n<li>11 \u2013 Word and Energy<\/li>\n<li>12 \u2013 Sound<\/li>\n<li>13 \u2013 Why Do We Fall Ill<\/li>\n<li>14 \u2013 Natural Resources<\/li>\n<li>15 \u2013 Improvement in Food Resources<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_9_Science_Structure_of_the_Atom_part_1\"><\/span>NCERT Solutions for Class 9 Science Structure of the Atom part 1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_What_are_canal_rays\"><\/span><strong>1. What are canal rays?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>E. Goldstein discovered positively charged rays, those rays are called canal rays.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_If_an_atom_contains_one_electron_and_one_proton_will_it_carry_any_charge_or_not\"><\/span><strong>2. If an atom contains one electron and one proton, will it carry any charge or not?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>That atom will not contain any charge because one negative charge of single electron and one positive charge of single proton are neutralized by each other.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_On_the_basis_of_Thomsons_model_of_an_atom_explain_how_the_atom_is_neutral_as_a_whole\"><\/span><strong>1. On the basis of Thomson\u2019s model of an atom, explain how the atom is neutral as a whole.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>As per Thomson\u2019s model of an atom, the number of electrons (negatively charged) are equal to the number of protons (positively charged) in an atom. Hence the + and \u2013 charges are neutralized by each other that makes atom neutral as a whole.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_On_the_basis_of_Rutherfords_model_of_an_atom_which_subatomic_particle_is_present_in_the_nucleus_of_an_atom\"><\/span><strong>2. On the basis of Rutherford\u2019s model of an atom, which subatomic particle is present in the nucleus of an atom?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>The sub atomic particle proton is present in the nucleus of an atom according to Rutherford\u2019s model of an atom.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_Draw_a_sketch_of_Bohrs_model_of_an_atom_with_three_shells\"><\/span><strong>3. Draw a sketch of Bohr\u2019s model of an atom with three shells.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" id=\"Picture 1\" class=\"\" style=\"height: 138px; width: 131px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/09\/science\/ch04\/image001.png\" \/><\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"4_What_do_you_think_would_be_the_observation_if_the_%CE%B1-particle_scattering_experiment_is_carried_out_using_a_foil_of_a_metal_other_than_gold\"><\/span><strong>4. What do you think would be the observation if the \u03b1-particle scattering experiment is carried out using a foil of a metal other than gold?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Yes the observations would have been different if the \u03b1-particle scattering experiment is carried out using a foil of a metal other than gold.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"5_Name_the_three_sub-atomic_particles_of_an_atom\"><\/span><strong>5. Name the three sub-atomic particles of an atom.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Proton, Neutron and Electron.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"6_Helium_atom_has_an_atomic_mass_of_4_u_and_two_protons_in_its_nucleus_How_many_neutrons_does_it_have\"><\/span><strong>6. Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>The number of neutrons present in a helium atom<\/p>\n<p style=\"text-align: justify;\">= atomic mass \u2013 no. of protons<\/p>\n<p style=\"text-align: justify;\">= 4-2 = 2<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_Write_the_distribution_of_electrons_in_carbon_and_sodium_atoms\"><\/span><strong>1. Write the distribution of electrons in carbon and sodium atoms.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>Distribution of electrons in carbon atom: atomic number of carbon = 6 = 2,4<\/p>\n<p style=\"text-align: justify;\">Distribution of electrons in sodium atom: atomic number of sodium = 11 = 2,8,1<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_If_K_and_L_shells_of_an_atom_are_full_then_what_would_be_the_total_number_of_electrons_in_the_atom\"><\/span><strong>2. If K and L shells of an atom are full, then what would be the total number of electrons in the atom?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>If K and L shells of an atom are full, then the total number of electron in the atom will be 10 because K shell can accommodate total 2 and L shell can accommodate maximum 8 electrons that makes a total of 10.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_How_will_you_find_the_valency_of_chlorine_sulphur_and_magnesium\"><\/span><strong>1. How will you find the valency of chlorine, sulphur and magnesium?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>The electrons present in the outermost shell of an atom are known as the valence electrons. Those electrons determine the valency of that atom.<\/p>\n<p style=\"text-align: justify;\">The atomic number of chlorine is 17 = 2,8,7<\/p>\n<p style=\"text-align: justify;\">so the number of valence electrons for chlorine is 7 and it needs 1 more electron to complete its octet (8). Therefore, its valency is one.<\/p>\n<p style=\"text-align: justify;\">similarly, Sulphur = 16 = 2,8,6<\/p>\n<p style=\"text-align: justify;\">so the number of valence electrons for sulphur is 6 and it needs 2 more electrons to complete its octet (8). Therefore, its valency is two.<\/p>\n<p style=\"text-align: justify;\">similarly, for magnesium = 12 = 2,8,2<\/p>\n<p style=\"text-align: justify;\">It becomes easier for magnesium to give away its two valence than to acquire 6 more therefore its valency is two.<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_If_number_of_electrons_in_an_atom_is_8_and_number_of_protons_is_also_8_then\"><\/span><strong>2. If number of electrons in an atom is 8 and number of protons is also 8, then <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>(i) what is the atomic number of the atom? and <\/strong><\/p>\n<p style=\"text-align: justify;\"><strong>(ii) what is the charge on the atom?<\/strong><\/p>\n<p style=\"text-align: justify;\"><strong>Ans. (i)<\/strong> atomic number = number of protons = number of electrons = 8<\/p>\n<p style=\"text-align: justify;\"><strong>(ii)<\/strong>atom will be neutral (no charge) because number of protons(+) is equal to the number of electrons (-).<\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_With_the_help_of_Table_41_find_out_the_mass_number_of_oxygen_and_sulphur_atom\"><\/span><strong>3. With the help of Table 4.1, find out the mass number of oxygen and sulphur atom.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong>mass number of oxygen = number of neutrons + number of protons = 8+8 =16<\/p>\n<p style=\"text-align: justify;\">mass number of sulphur = number of neutrons + number of protons = 16 + 16 = 32<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/p>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_For_the_symbol_HD_and_T_tabulate_three_sub-atomic_particles_found_in_each_of_them\"><\/span><strong>1. For the symbol H,D and T tabulate three sub-atomic particles found in each of them.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. <\/strong><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" id=\"Picture 18\" class=\"\" style=\"height: 125px; width: 341px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/09\/science\/ch04\/image002.png\" \/><\/p>\n<hr \/>\n<h6 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_Write_the_electronic_configuration_of_any_one_pair_of_isotopes_and_isobars\"><\/span><strong>2. Write the electronic configuration of any one pair of isotopes and isobars.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p style=\"text-align: justify;\"><strong>Ans. Isotopes of carbon:<\/strong><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"height: 25px; width: 82px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/09\/science\/ch04\/image003.png\" \/>both have same number of electrons and protons.<\/p>\n<p style=\"text-align: justify;\"><strong>Isobars:<\/strong><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" style=\"height: 25px; width: 108px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/09\/science\/ch04\/image004.png\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_9_Science\"><\/span>NCERT Solutions for Class 9 Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 9 Science PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 9 Science includes text book solutions .NCERT Solutions for CBSE Class 9 Science have total 15 chapters. 9 Science NCERT Solutions in PDF for free Download on our website. Ncert Science class 9 solutions PDF and Science ncert class 9 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_app_for_Class_9\"><\/span>CBSE app for Class 9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To download\u00a0NCERT Solutions for class 9 Science, Computer Science, Home Science,Hindi ,English, Maths Social Science do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions for Class 9 Science Structure of the Atom part 1 Class 9 Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT &#8230; <a title=\"NCERT Solutions for Class 9 Science Structure of the Atom part 1\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-9-science-structure-of-the-atom-part-1\/\" aria-label=\"More on NCERT Solutions for Class 9 Science Structure of the Atom part 1\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[281,1377],"tags":[283,1344,216,349],"class_list":["post-4130","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ncert-solutions","category-science-cbse-class-09","tag-cbse-study-material","tag-class-9","tag-ncert-solutions","tag-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions for Class 9 Science Structure of the Atom part 1<\/title>\n<meta name=\"description\" content=\"NCERT Solutions for Class 9 Science Structure of the Atom part 1 in PDF format for free download. 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