How to determine the valence orbitals and valence electrons of an element

array(10) { [0]=> object(stdClass)#4253 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "NIwcDnFjj98" ["related_video_title"]=> string(43) "Electron Configuration - Basic introduction" ["posted_time"]=> string(19) "7 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [1]=> object(stdClass)#4226 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "FPk2ziB9iX0" ["related_video_title"]=> string(40) "Valence Electrons and the Periodic Table" ["posted_time"]=> string(19) "7 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [2]=> object(stdClass)#4251 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "J-DjEIlynjE" ["related_video_title"]=> string(74) "Energy Levels, Energy Sublevels, Orbitals, & Pauli Exclusion Principle" ["posted_time"]=> string(19) "9 лет назад" ["channelName"]=> string(32) "Richard Louie Chemistry Lectures" } [3]=> object(stdClass)#4258 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "0JNIYDtfXzw" ["related_video_title"]=> string(65) "How to Find the Number of Valence Electrons for Transition Metals" ["posted_time"]=> string(21) "4 года назад" ["channelName"]=> string(22) "Wayne Breslyn (Dr. B.)" } [4]=> object(stdClass)#4237 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "6dRdMy9tgzE" ["related_video_title"]=> string(94) "Orbital Diagrams and Electron Configuration - Basic Introduction - Chemistry Practice Problems" ["posted_time"]=> string(19) "7 лет назад" ["channelName"]=> string(27) "The Organic Chemistry Tutor" } [5]=> object(stdClass)#4255 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "DQGleX6Cwaw" ["related_video_title"]=> string(62) "Максимальное унижение Зеленского" ["posted_time"]=> string(24) "14 часов назад" ["channelName"]=> string(27) "Анатолий Шарий" } [6]=> object(stdClass)#4250 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "U8Cv_jwUP84" ["related_video_title"]=> string(172) "Руслан Левиев про российские танки, контрнаступление, ошибку ВСУ, ПВО и удары по жилым районам" ["posted_time"]=> string(21) "4 часа назад" ["channelName"]=> string(24) "BILD на русском" } [7]=> object(stdClass)#4260 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "4fezP875xOQ" ["related_video_title"]=> string(59) "4 Hours Chopin for Studying, Concentration & Relaxation" ["posted_time"]=> string(21) "3 года назад" ["channelName"]=> string(12) "HALIDONMUSIC" } [8]=> object(stdClass)#4236 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "blWdjRUPP6E" ["related_video_title"]=> string(72) "Разведчик о том, как использовать людей" ["posted_time"]=> string(25) "3 недели назад" ["channelName"]=> string(18) "Коллектив" } [9]=> object(stdClass)#4254 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "FN9UrysYkcg" ["related_video_title"]=> string(167) "⚡️12 МИНУТ НАЗАД! 20 цистерн с топливом взлетели на воздух! Взорван НПЗ и военная часть - НАКИ" ["posted_time"]=> string(23) "6 часов назад" ["channelName"]=> string(31) "Телеканал Прямий" } }