{"id":199260,"date":"2025-03-10T21:02:05","date_gmt":"2025-03-10T21:02:05","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=199260"},"modified":"2025-03-10T21:02:07","modified_gmt":"2025-03-10T21:02:07","slug":"is-the-following-statement-true-or-false","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/10\/is-the-following-statement-true-or-false\/","title":{"rendered":"Is the following statement true or false"},"content":{"rendered":"\n<p>Is the following statement true or false? The periodic law states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of physical and chemical properties.<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer: <strong>True<\/strong><\/h3>\n\n\n\n<p>The periodic law states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties. This principle forms the foundation of the <strong>modern periodic table<\/strong> and explains why elements within the same group (vertical columns) exhibit similar characteristics.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The periodic law was first proposed by <strong>Dmitri Mendeleev<\/strong> in 1869, but he initially arranged elements by increasing atomic mass. However, later refinements, particularly by <strong>Henry Moseley<\/strong> in 1913, led to the realization that <strong>atomic number (the number of protons in an atom\u2019s nucleus)<\/strong> is the key organizing principle, rather than atomic mass.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Periodic Trends and Properties:<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Groups and Periods:<\/strong> The periodic table is structured in <strong>groups (columns)<\/strong> and <strong>periods (rows)<\/strong>. Elements in the same group have similar valence electron configurations, which determines their chemical behavior.<\/li>\n\n\n\n<li><strong>Repetition of Properties:<\/strong> As elements are arranged in order of increasing atomic number, their properties repeat in a predictable manner. For example:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Alkali metals (Group 1)<\/strong> are highly reactive and form similar compounds.<\/li>\n\n\n\n<li><strong>Noble gases (Group 18)<\/strong> are chemically inert due to their stable electron configurations.<\/li>\n\n\n\n<li><strong>Transition metals<\/strong> exhibit gradual changes in properties.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Trends in the Periodic Table:<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Atomic radius decreases<\/strong> across a period and <strong>increases down a group<\/strong>.<\/li>\n\n\n\n<li><strong>Ionization energy (energy to remove an electron) increases<\/strong> across a period and <strong>decreases down a group<\/strong>.<\/li>\n\n\n\n<li><strong>Electronegativity (tendency to attract electrons) follows similar trends<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>This periodic repetition of properties proves that the arrangement by atomic number is fundamental to understanding chemical behavior, making the periodic law one of the most important principles in chemistry.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Is the following statement true or false? The periodic law states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of physical and chemical properties. The correct answer and explanation is : Answer: True The periodic law states that when elements are arranged in order of increasing atomic [&hellip;]<\/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-199260","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199260","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=199260"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199260\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=199260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=199260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=199260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}