{"id":230295,"date":"2025-06-09T06:33:28","date_gmt":"2025-06-09T06:33:28","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=230295"},"modified":"2025-06-09T06:33:31","modified_gmt":"2025-06-09T06:33:31","slug":"determine-the-name-of-these-compounds-from-their-formulas-1-ni2se3-2-p4s10","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/09\/determine-the-name-of-these-compounds-from-their-formulas-1-ni2se3-2-p4s10\/","title":{"rendered":"Determine the name of these compounds from their formulas: 1). Ni2Se3 2). P4S10"},"content":{"rendered":"\n<p>Determine the name of these compounds from their formulas: 1). Ni2Se3 2). P4S10<\/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<p>Here are the names of the compounds based on their formulas:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Ni\u2082Se\u2083<\/strong> \u2013 <strong>Nickel(III) selenide<\/strong><\/li>\n\n\n\n<li><strong>P\u2084S\u2081\u2080<\/strong> \u2013 <strong>Tetraphosphorus decasulfide<\/strong><\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p>To determine the names of chemical compounds from their formulas, we first need to identify whether the compound is <strong>ionic<\/strong> or <strong>covalent<\/strong>, as the naming rules differ for each.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">1) <strong>Ni\u2082Se\u2083 \u2013 Nickel(III) selenide<\/strong><\/h4>\n\n\n\n<p>This is an <strong>ionic compound<\/strong> consisting of a metal (<strong>Nickel<\/strong>) and a nonmetal (<strong>Selenium<\/strong>). In ionic compounds, we name the <strong>cation<\/strong> (metal) first and then the <strong>anion<\/strong> (nonmetal), changing the nonmetal&#8217;s ending to \u201c-ide.\u201d<br>Nickel is a <strong>transition metal<\/strong>, which can have <strong>multiple oxidation states<\/strong>, so we must determine which one it uses here.<\/p>\n\n\n\n<p>Selenium (Se) typically has a <strong>\u22122 charge<\/strong>. There are <strong>3 selenium atoms<\/strong>, each with a \u22122 charge, giving a total of <strong>\u22126<\/strong>.<br>To balance this, the <strong>2 nickel (Ni)<\/strong> atoms must collectively provide <strong>+6<\/strong>, so each nickel must be <strong>+3<\/strong>.<br>Therefore, the compound is <strong>Nickel(III) selenide<\/strong> (the Roman numeral III shows the +3 charge on Ni).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">2) <strong>P\u2084S\u2081\u2080 \u2013 Tetraphosphorus decasulfide<\/strong><\/h4>\n\n\n\n<p>This is a <strong>molecular (covalent) compound<\/strong> composed of two nonmetals (phosphorus and sulfur). For covalent compounds, we use <strong>Greek prefixes<\/strong> to indicate the number of atoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>4 phosphorus atoms = <strong>tetraphosphorus<\/strong><\/li>\n\n\n\n<li>10 sulfur atoms = <strong>decasulfide<\/strong> (&#8220;deca-&#8221; for 10 and &#8220;-sulfide&#8221; for sulfur)<\/li>\n<\/ul>\n\n\n\n<p>The rule is to use the <strong>full prefix<\/strong> for both elements (unless the first element is only one atom, in which case the prefix is omitted).<br>So, P\u2084S\u2081\u2080 is named <strong>Tetraphosphorus decasulfide<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Summary:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ni\u2082Se\u2083<\/strong> \u2192 Ionic compound \u2192 Transition metal with variable oxidation \u2192 <strong>Nickel(III) selenide<\/strong><\/li>\n\n\n\n<li><strong>P\u2084S\u2081\u2080<\/strong> \u2192 Covalent compound \u2192 Use Greek prefixes \u2192 <strong>Tetraphosphorus decasulfide<\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner4-739.jpeg\" alt=\"\" class=\"wp-image-230296\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Determine the name of these compounds from their formulas: 1). Ni2Se3 2). P4S10 The Correct Answer and Explanation is: Here are the names of the compounds based on their formulas: Explanation To determine the names of chemical compounds from their formulas, we first need to identify whether the compound is ionic or covalent, as 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-230295","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/230295","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=230295"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/230295\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=230295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=230295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=230295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}