[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-207478-105":59,"doc-detail-207478-en":124},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":117,"head_meta":119,"extra_data":121,"updated_unix":123},105,"en","gcse-9-1-combined-science-b-j26008-combined-science-higher-tier-question-paper","GCSE (9-1) Combined Science B - J260/08 Combined Science (Higher Tier) - Question Paper","","GCSE (9–1) Combined Science B (Twenty First Century Science) J260/08 Higher Tier question paper on radioactivity and radioactive half-life. The assessment requires clear written answers supported by working where appropriate. Students analyze a table of emitted radiation types and half-lives to select a suitable tracer for imaging, propose safety precautions for alpha emitters, and calculate neutron numbers and outer-shell electrons for radium-226. Additional items define activity and half-life, interpret decay detector graph data, and determine which element most readily reacts with iodine-131.",{"@graph":69,"@context":116},[70,84,99],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/gcse-9-1-combined-science-b-j26008-combined-science-higher-tier-question-paper/207478/",{"url":83,"name":65,"@type":85,"author":86,"headline":65,"publisher":89,"fileFormat":92,"inLanguage":63,"description":67,"dateModified":93,"datePublished":93,"encodingFormat":92,"isAccessibleForFree":94,"interactionStatistic":95},"DigitalDocument",{"name":87,"@type":88},"Cart","Person",{"url":74,"name":90,"@type":91},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":96,"interactionType":97,"userInteractionCount":4},"InteractionCounter",{"@type":98},"ViewAction",{"@type":100,"mainEntity":101},"FAQPage",[102,108,112],{"name":103,"@type":104,"acceptedAnswer":105},"How do students choose a radioactive tracer for an imaging scan in this paper?","Question",{"text":106,"@type":107},"Students identify which sample is suitable by using the radiation type and half-life values from the table, then explain the reasoning using those data.","Answer",{"name":109,"@type":104,"acceptedAnswer":110},"What precautions should hospital staff take when handling alpha-emitting samples A and B?",{"text":111,"@type":107},"The paper asks for two precautions to reduce risk when handling alpha emitters; answers must provide specific safety measures consistent with handling radioactive materials.",{"name":113,"@type":104,"acceptedAnswer":114},"What is the difference between activity and half-life as defined by the paper questions?",{"text":115,"@type":107},"Activity is defined as the number of decay events per second, while half-life is the time for the activity to fall to half of its original value.","https://schema.org",{"og:url":83,"og:type":118,"og:title":65,"og:site_name":90,"og:description":67},"article",{"robots":120,"canonical":83},"index,follow",{"doc_id":122,"site_id":62},207478,1788599737,{"code":4,"msg":5,"data":125},{"doc_id":122,"user_id":126,"nickname":87,"user_avatar":127,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":128,"file_id":129,"file_url":130,"file_type":131,"file_size":132,"view_count":4,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":133,"language":134,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":135,"faqs":136,"seo_title":137,"seo_description":67,"update_tm":123,"read_time":26},18829141979164,"https://eur-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Oxford Cambridge and RSA  \nFriday 7 June 2024 – Afternoon  \nGCSE (9–1) Combined Science B (Twenty First Century Science)  \nJ260/08 Combined Science (Higher Tier)  \nTime allowed: 1 hour 45 minutes  \nYou must have:  \n• a ruler (cm/mm)  \n• the Data and Equation Sheet for GCSE (9–1) Combined Science B (inside this document)  \nYou can use:  \n• an HB pencil  \n• a scientific or graphical calculator  \nH  \n* J 2 6 0 0 8 *  \n\n| Please write clearly in black ink. Do not write in the barcodes. |  |  |  |\n| --- | --- | --- | --- |\n| Centre number |  | Candidate number |  |\n| First name(s)  \u003Cbr>Last name   |  |  |  |\n\nINSTRUCTIONS  \n• Use black ink. You can use an HB pencil, but only for graphs and diagrams.  \n• Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown.  \n• Answer all the questions.  \n• Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong.  \nINFORMATION  \n• The total mark for this paper is 75.  \n• The marks for each question are shown in brackets [ ] .  \n• Quality of extended response will be assessed in questions marked with an asterisk (*) .  \n• This document has 24 pages.  \nADVICE  \n• Read each question carefully before you start your answer.  \n© OCR 2024 [601/8690/2] DC (SL/FC) 342919/4  \nOCR is an exempt Charity  \nTurn over  \n2  \n1 Doctors select radioactive isotopes for imaging scans and for treatments very carefully. The table shows the radiation emitted and half-lives of 6 radioactive samples.  \n\n| Sample | Radiation Emitted | Half-life |\n| --- | --- | --- |\n| A | Alpha | 10 days |\n| B | Alpha | 1600 years |\n| C | Beta | 8.0 days |\n| D | Beta | 2.7 days |\n| E | Gamma | 5.3 years |\n| F | Gamma | 8 days |\n\n(a) Which sample is suitable to be used as a radioactive tracer for an imaging scan?  \nExplain your answer.  \nUse data from the table.  \nSample .............................................................................................................................................  \nExplanation ......................................................................................................................................  \n..........................................................................................................................................................  \n..........................................................................................................................................................  \n..........................................................................................................................................................  \n..........................................................................................................................................................  \n[3]  \n(b) Samples A and B emit alpha radiation.  \nSuggest two precautions that should be taken by hospital staff when handling samples A and B. 1 .......................................................................................................................................................  \n2 .......................................................................................................................................................  \n[2]  \n3  \n(c) One of the samples in the table is radium-226 .  \nDetermine the number of neutrons in a nucleus of a radium-226 atom.  \nUse the Data and Equation Sheet.  \nNumber of neutrons = .......................................................... [2]  \n(d) How many outer shell electrons does each radium-226 atom have?  \nExplain your answer.  \nUse the Data and Equation Sheet.  \nNumber of outer-shell electrons ....................................................................................................... Explanation .....................................................................................................","cbCairUWvOzPllYS","https://ap.wps.com/l/cbCairUWvOzPllYS","pdf",4412374,24,"English","# Instructions\n## Reading and writing requirements\n## Marking and advice\n# Question 1: Radioactive isotopes\n## Tracer selection for imaging\n## Precautions for alpha samples\n## Neutrons in radium-226\n## Outer-shell electrons in radium-226\n## Reaction with iodine-131\n# Question 2: Activity and half-life\n## Definition of activity\n## Definition of half-life\n# Question 3: Decay graph and model\n## Matching model and experimental trend","[{\"question\":\"How do students choose a radioactive tracer for an imaging scan in this paper?\",\"answer\":\"Students identify which sample is suitable by using the radiation type and half-life values from the table, then explain the reasoning using those data.\"},{\"question\":\"What precautions should hospital staff take when handling alpha-emitting samples A and B?\",\"answer\":\"The paper asks for two precautions to reduce risk when handling alpha emitters; answers must provide specific safety measures consistent with handling radioactive materials.\"},{\"question\":\"What is the difference between activity and half-life as defined by the paper questions?\",\"answer\":\"Activity is defined as the number of decay events per second, while half-life is the time for the activity to fall to half of its original value.\"}]","GCSE (9-1) Combined Science B - J260/08 Combined Science (Higher Tier) - Question Paper | PDF"]