Chapter-2-Structure-of-Atoms

In this video, you will study  Chemistry Grade 9 Chapter 2 "Structure of atoms" by instructor Muhammad Abdullah Khan.  

This covers everything you need to know about structure of atoms, Its Theories and Experiments, The Planetary Model of an Atom, Properties of isotopes of Chlorine and much more 
We will help you prepare for the chemistry class 9 exam by providing an overview of Structure of atoms. Start learning now!

It is Pakistan’s first digital self-study platform that offers exam-preparation material for matric and intermediate students. We have designed 4K high-quality study material which caters more than 18 educational boards across Pakistan. Our signature content includes comprehensive video lectures, past paper solutions, book notes, MCQs, and quizzes. 

ShortcodesMessagesTimelineExceptionsViews2RouteQueries7Models38MailsGateSessionRequest
7.4.3PHP Version96.59msRequest Duration9MBMemory UsageGET video-lectures/chapter-details/{chapter_id}Route
Total time
0μs
    • Booting (42.17ms)
    • Application (54.31ms)
    • 1 x Application (56.23%)
      54.31ms
      1 x Booting (43.66%)
      42.17ms
      2 templates were rendered
      • app.v1-views.vcms.play-video-lectures (resources/views/app/v1-views/vcms/play-video-lectures.blade.php)2blade
        Params
        0
        data
        1
        success
      • app.layouts-app.vcms-layout (resources/views/app/layouts-app/vcms-layout.blade.php)15blade
        Params
        0
        obLevel
        1
        __env
        2
        app
        3
        errors
        4
        data
        5
        success
        6
        chapterDetailLink
        7
        __currentLoopData
        8
        item
        9
        loop
        10
        topic_video_url
        11
        topic_title
        12
        topic_description
        13
        topic_video_id
        14
        video_id
      uri
      GET video-lectures/chapter-details/{chapter_id}
      middleware
      web
      controller
      App\Http\Controllers\VideoLectureController@paidchapterDetails
      namespace
      App\Http\Controllers
      prefix
      where
      as
      guestcart.paid.chapter.details
      file
      app/Http/Controllers/VideoLectureController.php:153-167
      7 statements were executed12.52ms
      tutoriapkstage
      • select `id`, `chapter_title`, `description`, `is_paid`, `promotional_video_url`, `vimeo_video_thumbnail`, `video_thumbnail`, `show_custom_thumbnail`, `subject_id` from `vcms_chapters` where `id` = 66 limit 1680μs/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Bindings
        • 0. 66
        Backtrace
        • 15. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 16. /app/Http/Controllers/VideoLectureController.php:158
        • 19. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 20. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 21. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      • select `id`, `subject_title`, `parent_board_id`, `grade_id` from `vcms_subjects` where `vcms_subjects`.`id` in (6)500μs/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Backtrace
        • 20. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 21. /app/Http/Controllers/VideoLectureController.php:158
        • 24. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 25. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 26. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      • select `id`, `parent_board_name` from `parent_boards` where `parent_boards`.`id` in (1)330μs/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Backtrace
        • 25. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 26. /app/Http/Controllers/VideoLectureController.php:158
        • 29. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 30. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 31. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      • select `id`, `grade_name` from `user_grades` where `user_grades`.`id` in (1)1.54ms/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Backtrace
        • 25. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 26. /app/Http/Controllers/VideoLectureController.php:158
        • 29. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 30. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 31. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      • select `id`, `topic_title` as `title`, `chapter_id`, `video_url` as `topic_video_url`, `description` from `vcms_chapter_topics` where `vcms_chapter_topics`.`chapter_id` in (66)3.75ms/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Backtrace
        • 20. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 21. /app/Http/Controllers/VideoLectureController.php:158
        • 24. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 25. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 26. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      • select `id`, `summary_title` as `title`, `chapter_id`, `video_url` as `summary_video_url`, `description` from `vcms_chapter_summaries` where `vcms_chapter_summaries`.`chapter_id` in (66)1.78ms/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Backtrace
        • 20. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 21. /app/Http/Controllers/VideoLectureController.php:158
        • 24. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 25. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 26. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      • select `id`, `qa_title` as `title`, `chapter_id`, `video_url` as `qa_video_url`, `description` from `vcms_chapter_q_a_s` where `vcms_chapter_q_a_s`.`chapter_id` in (66)3.94ms/app/Repositories/VCMS/GuestCartRepository.php:156tutoriapkstage
        Metadata
        Backtrace
        • 20. /app/Repositories/VCMS/GuestCartRepository.php:156
        • 21. /app/Http/Controllers/VideoLectureController.php:158
        • 24. /vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:45
        • 25. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:219
        • 26. /vendor/laravel/framework/src/Illuminate/Routing/Route.php:176
      App\Models\VCMS\ChapterTopic
      34
      App\Models\Admin\Grades
      1
      App\Models\VCMS\ParentBoard
      1
      App\Models\VCMS\Subject
      1
      App\Models\VCMS\Chapter
      1
          _token
          zagWQ0TTPsWduys2octmVwv0KLLbVwpeqYl3vh3d
          _previous
          array:1 [ "url" => "https://dev.tutoria.pk/video-lectures/chapter-details/eyJpdiI6ImJnOTdFWHI2Wjgr...
          _flash
          array:2 [ "old" => [] "new" => [] ]
          PHPDEBUGBAR_STACK_DATA
          []
          path_info
          /video-lectures/chapter-details/eyJpdiI6ImJnOTdFWHI2WjgrcmQrKzA2UjdQOXc9PSIsInZhbHVlIjoiblQ3cXNmUEZBM1JRTVhGbCswVGRIQT09IiwibWFjIjoiODkxYzgxYjNlZTNhMDM4OGUzMmFjMWRkYjdhYmRiYmEzN2NjNmUxZDBmY2QxYjU3MDY4MGE0ZDIxOTQ4MWU1OSJ9
          status_code
          200
          status_text
          OK
          format
          html
          content_type
          text/html; charset=UTF-8
          request_query
          []
          request_request
          []
          request_headers
            0 of 0   
          array:17 [▶
  "accept-encoding" => array:1 [▶
    0 => "gzip, deflate, br, zstd"
  ]
  "sec-fetch-dest" => array:1 [▶
    0 => "document"
  ]
  "sec-fetch-user" => array:1 [▶
    0 => "?1"
  ]
  "sec-fetch-mode" => array:1 [▶
    0 => "navigate"
  ]
  "sec-fetch-site" => array:1 [▶
    0 => "none"
  ]
  "accept" => array:1 [▶
    0 => "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7"
  ]
  "user-agent" => array:1 [▶
    0 => "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
  ]
  "upgrade-insecure-requests" => array:1 [▶
    0 => "1"
  ]
  "sec-ch-ua-platform" => array:1 [▶
    0 => ""Windows""
  ]
  "sec-ch-ua-mobile" => array:1 [▶
    0 => "?0"
  ]
  "sec-ch-ua" => array:1 [▶
    0 => ""Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99""
  ]
  "cache-control" => array:1 [▶
    0 => "no-cache"
  ]
  "pragma" => array:1 [▶
    0 => "no-cache"
  ]
  "connection" => array:1 [▶
    0 => "keep-alive"
  ]
  "host" => array:1 [▶
    0 => "dev.tutoria.pk"
  ]
  "content-length" => array:1 [▶
    0 => ""
  ]
  "content-type" => array:1 [▶
    0 => ""
  ]
]
          request_server
            0 of 0   
          array:41 [▶
  "USER" => "www-data"
  "HOME" => "/var/www"
  "HTTP_ACCEPT_ENCODING" => "gzip, deflate, br, zstd"
  "HTTP_SEC_FETCH_DEST" => "document"
  "HTTP_SEC_FETCH_USER" => "?1"
  "HTTP_SEC_FETCH_MODE" => "navigate"
  "HTTP_SEC_FETCH_SITE" => "none"
  "HTTP_ACCEPT" => "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7"
  "HTTP_USER_AGENT" => "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
  "HTTP_UPGRADE_INSECURE_REQUESTS" => "1"
  "HTTP_SEC_CH_UA_PLATFORM" => ""Windows""
  "HTTP_SEC_CH_UA_MOBILE" => "?0"
  "HTTP_SEC_CH_UA" => ""Chromium";v="130", "HeadlessChrome";v="130", "Not?A_Brand";v="99""
  "HTTP_CACHE_CONTROL" => "no-cache"
  "HTTP_PRAGMA" => "no-cache"
  "HTTP_CONNECTION" => "keep-alive"
  "HTTP_HOST" => "dev.tutoria.pk"
  "REDIRECT_STATUS" => "200"
  "SERVER_NAME" => "dev.tutoria.pk"
  "SERVER_PORT" => "443"
  "SERVER_ADDR" => "64.227.182.214"
  "REMOTE_PORT" => "51638"
  "REMOTE_ADDR" => "18.188.116.205"
  "SERVER_SOFTWARE" => "nginx/1.18.0"
  "GATEWAY_INTERFACE" => "CGI/1.1"
  "HTTPS" => "on"
  "REQUEST_SCHEME" => "https"
  "SERVER_PROTOCOL" => "HTTP/1.1"
  "DOCUMENT_ROOT" => "/var/www/html/legacy-live"
  "DOCUMENT_URI" => "/index.php"
  "REQUEST_URI" => "/video-lectures/chapter-details/eyJpdiI6ImJnOTdFWHI2WjgrcmQrKzA2UjdQOXc9PSIsInZhbHVlIjoiblQ3cXNmUEZBM1JRTVhGbCswVGRIQT09IiwibWFjIjoiODkxYzgxYjNlZTNhMDM4OGUzMmFjMWRkYjdhYmRiYmEzN2NjNmUxZDBmY2QxYjU3MDY4MGE0ZDIxOTQ4MWU1OSJ9 ◀/video-lectures/chapter-details/eyJpdiI6ImJnOTdFWHI2WjgrcmQrKzA2UjdQOXc9PSIsInZhbHVlIjoiblQ3cXNmUEZBM1JRTVhGbCswVGRIQT09IiwibWFjIjoiODkxYzgxYjNlZTNhMDM4OGUzMmFj ▶"
  "SCRIPT_NAME" => "/index.php"
  "CONTENT_LENGTH" => ""
  "CONTENT_TYPE" => ""
  "REQUEST_METHOD" => "GET"
  "QUERY_STRING" => ""
  "SCRIPT_FILENAME" => "/var/www/html/legacy-live/index.php"
  "FCGI_ROLE" => "RESPONDER"
  "PHP_SELF" => "/index.php"
  "REQUEST_TIME_FLOAT" => 1747919189.1645
  "REQUEST_TIME" => 1747919189
]
          request_cookies
          []
          response_headers
            0 of 0   
          array:5 [▶
  "cache-control" => array:1 [▶
    0 => "no-cache, private"
  ]
  "date" => array:1 [▶
    0 => "Thu, 22 May 2025 13:06:29 GMT"
  ]
  "content-type" => array:1 [▶
    0 => "text/html; charset=UTF-8"
  ]
  "set-cookie" => array:1 [▶
    0 => "app_session=eyJpdiI6Im13T0NGejNiZWRTWUNicjdDVlhjdnc9PSIsInZhbHVlIjoick1zU1B1OWtpTzY3eUZGSitNbTcxcnFPXC9RQnFva0NLZnBETjluVXJyaU1sUjFlTGNGNmZpSmpiS0ZcL1RwM2JGIiwibWFjIjoiMmFiOWUzZjlhMzBmMjg2Njg0MmU0ZjUwZmIyMWY4MGYxNGM1NTg1ZDI0ZjNlYjgwZjI4NzI2N2EzMDIxMzAzMiJ9; expires=Thu, 22-May-2025 15:06:29 GMT; Max-Age=7200; path=/; domain=.dev.tutoria.pk; httponly ◀app_session=eyJpdiI6Im13T0NGejNiZWRTWUNicjdDVlhjdnc9PSIsInZhbHVlIjoick1zU1B1OWtpTzY3eUZGSitNbTcxcnFPXC9RQnFva0NLZnBETjluVXJyaU1sUjFlTGNGNmZpSmpiS0ZcL1RwM2JGIiwi ▶"
  ]
  "Set-Cookie" => array:1 [▶
    0 => "app_session=eyJpdiI6Im13T0NGejNiZWRTWUNicjdDVlhjdnc9PSIsInZhbHVlIjoick1zU1B1OWtpTzY3eUZGSitNbTcxcnFPXC9RQnFva0NLZnBETjluVXJyaU1sUjFlTGNGNmZpSmpiS0ZcL1RwM2JGIiwibWFjIjoiMmFiOWUzZjlhMzBmMjg2Njg0MmU0ZjUwZmIyMWY4MGYxNGM1NTg1ZDI0ZjNlYjgwZjI4NzI2N2EzMDIxMzAzMiJ9; expires=Thu, 22-May-2025 15:06:29 GMT; domain=.dev.tutoria.pk; path=/; httponly ◀app_session=eyJpdiI6Im13T0NGejNiZWRTWUNicjdDVlhjdnc9PSIsInZhbHVlIjoick1zU1B1OWtpTzY3eUZGSitNbTcxcnFPXC9RQnFva0NLZnBETjluVXJyaU1sUjFlTGNGNmZpSmpiS0ZcL1RwM2JGIiwi ▶"
  ]
]
          session_attributes
            0 of 0   
          array:4 [▶
  "_token" => "zagWQ0TTPsWduys2octmVwv0KLLbVwpeqYl3vh3d"
  "_previous" => array:1 [▶
    "url" => "https://dev.tutoria.pk/video-lectures/chapter-details/eyJpdiI6ImJnOTdFWHI2WjgrcmQrKzA2UjdQOXc9PSIsInZhbHVlIjoiblQ3cXNmUEZBM1JRTVhGbCswVGRIQT09IiwibWFjIjoiODkxYzgxYjNlZTNhMDM4OGUzMmFjMWRkYjdhYmRiYmEzN2NjNmUxZDBmY2QxYjU3MDY4MGE0ZDIxOTQ4MWU1OSJ9 ◀https://dev.tutoria.pk/video-lectures/chapter-details/eyJpdiI6ImJnOTdFWHI2WjgrcmQrKzA2UjdQOXc9PSIsInZhbHVlIjoiblQ3cXNmUEZBM1JRTVhGbCswVGRIQT09IiwibWFjIjoiODkxYz ▶"
  ]
  "_flash" => array:2 [▶
    "old" => []
    "new" => []
  ]
  "PHPDEBUGBAR_STACK_DATA" => []
]