{"id":215893,"date":"2025-05-18T04:54:44","date_gmt":"2025-05-18T04:54:44","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=215893"},"modified":"2025-05-18T04:54:47","modified_gmt":"2025-05-18T04:54:47","slug":"classify-the-types-of-intermolecular-forces-present-in-each-of-the-following-fluorides-of-the-second-period-elements","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/18\/classify-the-types-of-intermolecular-forces-present-in-each-of-the-following-fluorides-of-the-second-period-elements\/","title":{"rendered":"Classify the types of intermolecular forces present in each of the following fluorides of the second period elements."},"content":{"rendered":"\n<p>Classify the types of intermolecular forces present in each of the following fluorides of the second period elements.<\/p>\n\n\n\n<p>LiF, melting point 845 oC:<\/p>\n\n\n\n<p>a. ionic<br>b. hydrogen bonding<br>c. dipole-dipole<br>d. dispersion<br>BeF2, melting point 800 oC:<\/p>\n\n\n\n<p>a. ionic<br>b. hydrogen bonding<br>c. dipole-dipole<br>d. dispersion<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Correct Answers:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LiF: a. ionic<\/strong><\/li>\n\n\n\n<li><strong>BeF\u2082: a. ionic<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Detailed Explanation (300+ words):<\/strong><\/h3>\n\n\n\n<p>Intermolecular forces are the interactions between molecules that affect a substance\u2019s physical properties, such as melting point, boiling point, and solubility. In the case of <strong>fluorides of second-period elements<\/strong>, the nature of bonding depends heavily on the <strong>electronegativity difference<\/strong> and the <strong>type of elements involved<\/strong> (metal vs. non-metal).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Lithium Fluoride (LiF)<\/strong><\/h3>\n\n\n\n<p><strong>Correct answer: a. ionic<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LiF<\/strong> consists of a metal (<strong>Li\u207a<\/strong>) and a highly electronegative non-metal (<strong>F\u207b<\/strong>), which form <strong>ionic bonds<\/strong>.<\/li>\n\n\n\n<li>The <strong>electronegativity difference<\/strong> between lithium (0.98) and fluorine (3.98) is significant (\u0394 \u2248 3.0), indicating complete transfer of electrons from lithium to fluorine.<\/li>\n\n\n\n<li>This transfer leads to the formation of oppositely charged ions that are held together by <strong>strong electrostatic forces<\/strong>, known as <strong>ionic bonds<\/strong>.<\/li>\n\n\n\n<li>These ionic forces are much stronger than any typical <strong>intermolecular force<\/strong> such as hydrogen bonding, dipole-dipole, or dispersion.<\/li>\n\n\n\n<li>This strong bonding is reflected in LiF\u2019s <strong>very high melting point of 845\u00b0C<\/strong>, which is characteristic of ionic compounds.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Beryllium Fluoride (BeF\u2082)<\/strong><\/h3>\n\n\n\n<p><strong>Correct answer: a. ionic<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>BeF\u2082<\/strong> is composed of <strong>beryllium (Be\u00b2\u207a)<\/strong> and <strong>fluoride ions (F\u207b)<\/strong>.<\/li>\n\n\n\n<li>While Be has a smaller size and higher charge density compared to Li, its interaction with F still leads to <strong>predominantly ionic bonding<\/strong>.<\/li>\n\n\n\n<li>The <strong>electronegativity difference<\/strong> between Be (1.57) and F (3.98) is substantial (\u0394 \u2248 2.4), justifying its <strong>ionic character<\/strong>.<\/li>\n\n\n\n<li>BeF\u2082 has a high <strong>melting point of ~800\u00b0C<\/strong>, further indicating the presence of <strong>strong ionic bonds<\/strong>.<\/li>\n\n\n\n<li>Although Be\u00b2\u207a has a high polarizing ability, which might impart some <strong>covalent character<\/strong> to the bond, the overall bonding is best described as <strong>ionic<\/strong> in nature.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Other Options Explained:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hydrogen bonding (b)<\/strong> requires H to be directly bonded to N, O, or F \u2014 which does not occur in either LiF or BeF\u2082.<\/li>\n\n\n\n<li><strong>Dipole-dipole (c)<\/strong> interactions are weaker and occur between polar molecules, not in ionic salts.<\/li>\n\n\n\n<li><strong>Dispersion forces (d)<\/strong> are present in all molecules but are negligible compared to the strong <strong>ionic bonds<\/strong> in these salts.<\/li>\n<\/ul>\n\n\n\n<p>Thus, both <strong>LiF<\/strong> and <strong>BeF\u2082<\/strong> are best classified as having <strong>ionic<\/strong> bonding.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Classify the types of intermolecular forces present in each of the following fluorides of the second period elements. LiF, melting point 845 oC: a. ionicb. hydrogen bondingc. dipole-dipoled. dispersionBeF2, melting point 800 oC: a. ionicb. hydrogen bondingc. dipole-dipoled. dispersion The Correct Answer and Explanation is: Correct Answers: Detailed Explanation (300+ words): Intermolecular forces are the [&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-215893","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215893","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=215893"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215893\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=215893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=215893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=215893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}