Which of the following ions possess a noble gas electron configuration?
(a) K+
(d) O-
(b) He+
(e) F-
(c) H-
(f) Ca2+<\/p>\n\n\n\n
The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n The ions that possess a noble gas electron configuration<\/strong> are: K\u207a<\/strong>, F\u207b<\/strong>, and Ca\u00b2\u207a<\/strong>.<\/p>\n\n\n\n (a) K\u207a, (e) F\u207b, and (f) Ca\u00b2\u207a.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" Which of the following ions possess a noble gas electron configuration?(a) K+(d) O-(b) He+(e) F-(c) H-(f) Ca2+ The Correct Answer and Explanation is : The ions that possess a noble gas electron configuration are: K\u207a, F\u207b, and Ca\u00b2\u207a. Explanation: Correct Answer: (a) K\u207a, (e) F\u207b, and (f) Ca\u00b2\u207a.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-185022","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/185022","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=185022"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/185022\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=185022"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=185022"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=185022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
\n
Noble gases have a fully filled outer shell (also called a stable octet or duet for helium) which makes them highly stable. This configuration corresponds to the electron configuration of the noble gases like He, Ne, Ar, etc.<\/li>\n\n\n\n\n
Potassium (K) has 19 electrons, and its configuration is ( 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 ). When K loses one electron to form ( \\text{K}^+ ), it has 18 electrons, matching the configuration of argon (( 1s^2 2s^2 2p^6 3s^2 3p^6 )). Thus, ( \\text{K}^+ ) has a noble gas configuration.<\/li>\n\n\n\n
Helium has 2 electrons (( 1s^2 )). Losing one electron gives ( \\text{He}^+ ) with 1 electron, which does not match a noble gas configuration. So, ( \\text{He}^+ ) does not have a noble gas configuration.<\/li>\n\n\n\n
Hydrogen (( H )) has 1 electron. When it gains one electron to form ( \\text{H}^- ), its configuration becomes ( 1s^2 ), which matches helium. Thus, ( \\text{H}^- ) has a noble gas configuration.<\/li>\n\n\n\n
Oxygen has 8 electrons (( 1s^2 2s^2 2p^4 )). Adding one electron gives ( \\text{O}^- ) (( 1s^2 2s^2 2p^5 )), which does not match any noble gas configuration.<\/li>\n\n\n\n
Fluorine has 9 electrons (( 1s^2 2s^2 2p^5 )). Adding one electron to form ( \\text{F}^- ) gives 10 electrons (( 1s^2 2s^2 2p^6 )), matching neon\u2019s configuration. Thus, ( \\text{F}^- ) has a noble gas configuration.<\/li>\n\n\n\n
Calcium has 20 electrons (( 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 )). Losing two electrons to form ( \\text{Ca}^{2+} ) leaves 18 electrons (( 1s^2 2s^2 2p^6 3s^2 3p^6 )), matching argon\u2019s configuration. Thus, ( \\text{Ca}^{2+} ) has a noble gas configuration.<\/li>\n<\/ul>\n\n\n\nCorrect Answer:<\/h3>\n\n\n\n