{"id":226078,"date":"2025-06-04T20:38:20","date_gmt":"2025-06-04T20:38:20","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=226078"},"modified":"2025-06-04T20:38:21","modified_gmt":"2025-06-04T20:38:21","slug":"which-pair-of-elements-has-the-most-similar-properties","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/04\/which-pair-of-elements-has-the-most-similar-properties\/","title":{"rendered":"Which pair of elements has the most similar properties"},"content":{"rendered":"\n

Which pair of elements has the most similar properties? (a) Sr and Ba (b) S and Ar(c) H and He (d) K and Se<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is: (a) Sr and Ba<\/strong><\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

Elements with the most similar properties are those found in the same group (column)<\/strong> of the periodic table because they have the same number of valence electrons<\/strong>, which determines their chemical behavior.<\/p>\n\n\n\n

Strontium (Sr)<\/strong> and Barium (Ba)<\/strong> are both in Group 2<\/strong>, known as the alkaline earth metals<\/strong>. This group includes elements like Be, Mg, Ca, Sr, Ba, and Ra. They each have two valence electrons<\/strong>, which makes them highly reactive metals that readily lose those two electrons to form +2 cations. Because of their similar electron configurations and position in the periodic table, Sr and Ba exhibit nearly identical chemical properties such as:<\/p>\n\n\n\n

    \n
  • Forming ionic compounds with halides (like SrCl\u2082 and BaCl\u2082)<\/li>\n\n\n\n
  • Reacting with water to form hydroxides and hydrogen gas<\/li>\n\n\n\n
  • Having similar reactivity trends (reactivity increases down the group)<\/li>\n\n\n\n
  • Forming basic oxides<\/li>\n<\/ul>\n\n\n\n

    Now let’s briefly look at why the other options are incorrect:<\/p>\n\n\n\n

    (b) S and Ar:<\/strong>
    Sulfur is a reactive nonmetal<\/strong> in Group 16, while Argon is a noble gas<\/strong> in Group 18. Argon is chemically inert due to its complete outer shell, whereas sulfur is quite reactive and commonly forms -2 anions. Their properties are very different.<\/p>\n\n\n\n

    (c) H and He:<\/strong>
    Hydrogen is a reactive nonmetal and often behaves like an alkali metal or a halogen in bonding. Helium is a noble gas and extremely unreactive. Despite being adjacent on the table, they are chemically dissimilar.<\/p>\n\n\n\n

    (d) K and Se:<\/strong>
    Potassium is an alkali metal (Group 1) and very reactive. Selenium is a nonmetal in Group 16. Their properties differ significantly.<\/p>\n\n\n\n

    Thus, the pair with the most similar chemical properties is Sr and Ba<\/strong>, due to their shared group and common metallic behavior.<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Which pair of elements has the most similar properties? (a) Sr and Ba (b) S and Ar(c) H and He (d) K and Se The Correct Answer and Explanation is: The correct answer is: (a) Sr and Ba Explanation: Elements with the most similar properties are those found in the same group (column) of the […]<\/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-226078","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/226078","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=226078"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/226078\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=226078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=226078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=226078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}