[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-657085-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-657085-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","atomic-structure-o-level-chemistry-knowledge-and-skills","Atomic Structure - O Level Chemistry - Knowledge and Skills","","This document outlines the knowledge and skills required for O Level Chemistry on atomic structure. It covers the relative charges and approximate relative masses of protons, neutrons, and electrons, and explains the structure of an atom using diagrams: nucleons in the nucleus and electrons arranged in shells (energy levels). It defines proton (atomic) number, nucleon (mass) number, and isotope, and trains learners to interpret symbols and deduce protons, neutrons, and electrons for atoms and ions using given numbers.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/atomic-structure-o-level-chemistry-knowledge-and-skills/657085/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/atomic-structure-o-level-chemistry-knowledge-and-skills/657085.png","ImageObject",300,407,{"name":42,"@type":43},"lilac","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-30","2026-10-26",true,{"@type":52,"interactionType":53,"userInteractionCount":33},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What are the relative charges and approximate relative masses of proton, neutron, and electron?","Question",{"text":62,"@type":63},"A proton has relative charge +1 and relative mass about 1 a.m.u. A neutron has relative charge 0 and relative mass about 1 a.m.u. An electron has relative charge −1 and relative mass 1/1840 a.m.u.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How is the structure of an atom described in modern theory?",{"text":67,"@type":63},"An atom contains a dense nucleus holding protons and neutrons, while electrons orbit in specific energy levels called electron shells. The outermost shell is the valence shell.",{"name":69,"@type":60,"acceptedAnswer":70},"How do you deduce numbers of protons, neutrons, and electrons in atoms and ions?",{"text":71,"@type":63},"Use the given proton (atomic) number and nucleon (mass) number to determine protons and neutrons, then deduce electrons for the atom or ion based on that information. The document emphasizes interpreting these numbers to find the particle counts.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},657085,1793052380,{"code":4,"msg":81,"data":82},"success",[83,87,91,94,99,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":92,"slug":93},70,"exam",{"id":95,"doc_module":4,"doc_module_name":25,"category_name":96,"show_sort_weight":97,"slug":98},5,"Comic",60,"comic",{"id":100,"doc_module":4,"doc_module_name":25,"category_name":101,"show_sort_weight":102,"slug":103},6,"Technology",50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":95,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":33,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":144,"read_time":145},3985747861865,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Atomic Structure  \nFor the Original  \nO’ Level Chemistry  \nPeriodic Table  \nWhat do I need to know about atomic structure?  \nAtomic Structure – Knowledge and Skills  \nAtomic structure  \n(a) State the relative charges and approximate relative masses of a proton , a neutron and an electron.  \n(b) Describe , with the aid of diagrams, the structure of an atom as containing protons and neutrons (nucleons) in the nucleus and electrons arranged in shells (energy levels). A copy of the Periodic  \nTable will be given in all examinations.  \n(c) Define proton (atomic) number and nucleon (mass) number.  \n(d) Interpret and use symbols such as 126 C.  \n(e) Define the term isotope.  \n(f) Deduce the numbers of protons, neutrons and electrons in atoms and ions given proton and nucleon numbers.  \n􀁸 Singapore Examinations and Assessment Board  \n􀁸 University of Cambridge International Examinations  \n􀁸 Ministry of Education, Singapore  \nWhat is the modern theory of atomic structure?  \nIntroduction to Atomic Structure  \nIntroduction to Atomic Structure  \n􀁸 An atom is the smallest part of a  \nchemical element that demonstrates  \nall of the typical chemical properties  \nof that element.  \nIntroduction to Atomic Structure  \nThe atom is composed of a small, dense nucleus that contains  \nprotons and neutrons.  \n􀁸 Relative mass of a proton = 1 a.m.u.*  \n􀁸 Relative mass of a neutron = 1 a.m.u.*  \n􀁸 Relative charge on a proton = +1 .  \n􀁸 Relative charge on a neutron = 0 .  \n*a. m. u. is an abbreviation for atomic mass unit.  \nIntroduction to Atomic Structure  \nElectrons orbit the nucleus in specific energy levels called electron shells. The outermost electron shell is called the  \nvalence shell.  \n􀁸 Relative mass of an electron = 1 / 1840 a.m.u.  \n􀁸 Relative charge on an electron = –1 .  \nIntroduction to Atomic Structure  \n􀁸 The inner electron shell can hold a maximum number of 2 electrons.  \n􀁸 The second electron shell can hold a maximum number of 8 electrons.  \n􀁸 The third electron shell can hold a maximum number of 8 electrons.","cbCairOf8j7EvNbI","https://ap.wps.com/l/cbCairOf8j7EvNbI","pdf",6206460,130,"English","# Atomic structure - Knowledge and Skills\n## Relative charges and masses of particles\n## Structure of an atom: nucleus and electron shells\n## Proton (atomic) number and nucleon (mass) number\n## Interpreting atomic symbols and isotope definition\n## Deducing particles in atoms and ions\n# Modern theory of atomic structure\n## Core components: nucleus and electron shells\n## Properties of protons, neutrons, and electrons\n## Electron shell capacity and valence shell","[{\"question\":\"What are the relative charges and approximate relative masses of proton, neutron, and electron?\",\"answer\":\"A proton has relative charge +1 and relative mass about 1 a.m.u. A neutron has relative charge 0 and relative mass about 1 a.m.u. An electron has relative charge −1 and relative mass 1/1840 a.m.u.\"},{\"question\":\"How is the structure of an atom described in modern theory?\",\"answer\":\"An atom contains a dense nucleus holding protons and neutrons, while electrons orbit in specific energy levels called electron shells. The outermost shell is the valence shell.\"},{\"question\":\"How do you deduce numbers of protons, neutrons, and electrons in atoms and ions?\",\"answer\":\"Use the given proton (atomic) number and nucleon (mass) number to determine protons and neutrons, then deduce electrons for the atom or ion based on that information. The document emphasizes interpreting these numbers to find the particle counts.\"}]","Atomic Structure - O Level Chemistry - Knowledge and Skills | PDF",1792973609,328]