{"id":13892,"date":"2020-11-30T10:03:56","date_gmt":"2020-11-30T04:33:56","guid":{"rendered":"https:\/\/cbselibrary.com\/?p=13892"},"modified":"2020-11-30T12:56:57","modified_gmt":"2020-11-30T07:26:57","slug":"covalent-bond-formed","status":"publish","type":"post","link":"https:\/\/cbselibrary.com\/covalent-bond-formed\/","title":{"rendered":"How is covalent bond is formed?"},"content":{"rendered":"<h2><strong>How is covalent bond is formed?<\/strong><\/h2>\n<p>&nbsp;<\/p>\n<h3><strong><span style=\"color: #3366ff;\">A. Formation of a single covalent bonds<\/span><\/strong><\/h3>\n<p><strong>Formation of chlorine molecule, Cl<sub>2<\/sub><\/strong><\/p>\n<ul>\n<li>A chlorine atom has an electron arrangement of 2.8.7. It has <strong>seven valence electrons<\/strong>.<\/li>\n<li>Each chlorine atom needs one more electron to achieve a stable octet electron arrangement (similar to argon).<\/li>\n<li>As a result, <strong>two chlorine atoms<\/strong> will combine with each other. Each of these two chlorine atoms <strong>contributes one electron<\/strong> to each other for <strong>sharing<\/strong>.<\/li>\n<li>By doing so, the two chlorine atoms <strong>share one pair of electrons<\/strong> that bind them together, called a <strong>single covalent bond,<\/strong> as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110562 aligncenter\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-1.png\" alt=\"How is covalent bond is formed 1\" width=\"357\" height=\"310\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-1.png 357w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-1-300x261.png 300w\" sizes=\"(max-width: 357px) 100vw, 357px\" \/><\/li>\n<li>Hence, a covalent molecule with a single covalent bond is formed. It has the molecular formula of Cl<sub>2<\/sub>.<\/li>\n<li>The formation of the chlorine molecule can be represented by the <strong>Lewis structure<\/strong> as shown below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110564\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-2.png\" alt=\"How is covalent bond is formed 2\" width=\"440\" height=\"51\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-2.png 440w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-2-300x35.png 300w\" sizes=\"(max-width: 440px) 100vw, 440px\" \/><\/li>\n<\/ul>\n<p><strong>Formation of a water molecule, H<sub>2<\/sub>O<\/strong><\/p>\n<ul>\n<li>An oxygen atom has an electron arrangement of 2.6. It has <strong>six valence electrons<\/strong>.<\/li>\n<li>Each oxygen atom needs two more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>A hydrogen atom has an electron arrangement of 1 and <strong>one valence electron<\/strong>.<\/li>\n<li>Each hydrogen atom needs one more electron to achieve a stable duplet electron arrangement (similar to helium).<\/li>\n<li>As a result, <strong>two hydrogen atoms <\/strong>will combine with <strong>one oxygen atom<\/strong> through the <strong>sharing<\/strong> of electrons. Each of the two hydrogen atoms <strong>contributes one electron<\/strong> and one oxygen atom <strong>contributes two electrons<\/strong> for <strong>sharing<\/strong>.<\/li>\n<li>By doing so, one oxygen atom is bonded to each of the two hydrogen atoms by a <strong>shared pair of electrons<\/strong> so that all the three atoms achieve in <strong>stable noble gas electron arrangements<\/strong>, as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110570\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-3.png\" alt=\"How is covalent bond is formed 3\" width=\"395\" height=\"336\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-3.png 395w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-3-300x255.png 300w\" sizes=\"(max-width: 395px) 100vw, 395px\" \/><\/li>\n<li>Hence, a covalent molecule, H<sub>2<\/sub>0, with two single covalent bonds is formed.<\/li>\n<li>The formation of the water molecule can be represented by the <strong>Lewis structure<\/strong> as shown below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110571\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-4.png\" alt=\"How is covalent bond is formed 4\" width=\"418\" height=\"57\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-4.png 418w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-4-300x41.png 300w\" sizes=\"(max-width: 418px) 100vw, 418px\" \/><\/li>\n<\/ul>\n<p><strong>People also ask<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/cbselibrary.com\/chemical-bonding-compound-formation\/\">Chemical Bonding and Compound Formation<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/chemical-bonding\/\">Chemical Bonding<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/covalent-bond\/\">What is Covalent Bond?<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/write-formula-covalent-compound\/\">Describe how to write a formula for a covalent compound<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/ions-form-ionic-bonds\/\">What causes ions to form ionic bonds?<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/explain-formation-ionic-bonds-examples\/\">Explain the formation of ionic bonds with examples<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/properties-ionic-covalent-compounds\/\">Properties of Ionic and Covalent Compounds<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/write-formula-ionic-compounds\/\">How do you write the formula for ionic compounds?<\/a><\/li>\n<li><a href=\"https:\/\/cbselibrary.com\/name-ionic-compound\/\">How do you Name an Ionic Compound?<\/a><\/li>\n<\/ul>\n<p><strong>Formation of a nitrogen trifluoride molecule, NF<sub>3<\/sub><\/strong><\/p>\n<ul>\n<li>A nitrogen atom has an electron arrangement of 2.5. It has <strong>five valence electrons<\/strong>.<\/li>\n<li>Each nitrogen atom needs three more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>A fluorine atom has an electron arrangement of 2.7. It has <strong>seven valence electrons<\/strong>.<\/li>\n<li>Each fluorine atom needs one more electron to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>As a result, <strong>one nitrogen atom <\/strong>will combine with <strong>three fluorine atoms<\/strong> through the <strong>sharing <\/strong>of electrons. One nitrogen atom <strong>contributes three electrons<\/strong> and each of the three fluorine atoms <strong>contributes one electron<\/strong> for <strong>sharing.<\/strong><\/li>\n<li>By doing so, one nitrogen atom is bonded to each of the three fluorine atoms by a <strong>shared pair<\/strong> of electrons so that all the four atoms achieve <strong>stable octet electron arrangements<\/strong>, as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110573\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-5.png\" alt=\"How is covalent bond is formed 5\" width=\"442\" height=\"453\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-5.png 442w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-5-293x300.png 293w\" sizes=\"(max-width: 442px) 100vw, 442px\" \/><\/li>\n<li>Hence, <strong>a covalent molecule<\/strong> NF<sub>3<\/sub> with three <strong>single covalent bonds<\/strong> is formed.<\/li>\n<li>The formation of the nitrogen trifluoride molecule can also be represented by the<strong> Lewis structure<\/strong> as shown below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110574\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-6.png\" alt=\"How is covalent bond is formed 6\" width=\"418\" height=\"90\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-6.png 418w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-6-300x65.png 300w\" sizes=\"(max-width: 418px) 100vw, 418px\" \/><\/li>\n<\/ul>\n<p><strong>Formation of a tetrachloromethane (carbon tetrachloride) molecule, CCl<sub>4<\/sub><\/strong><\/p>\n<ul>\n<li>A carbon atom has an electron arrangement of 2.4. It has <strong>four valence electrons<\/strong>.<\/li>\n<li>Each carbon atom needs four more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>A chlorine atom has an electron arrangement of 2.8.7. It has <strong>seven valence electrons<\/strong>.<\/li>\n<li>Each chlorine atom needs one more electron to achieve a stable octet electron arrangement (similar to argon).<\/li>\n<li>As a result, <strong>one carbon atom<\/strong> will combine with <strong>four chlorine atoms<\/strong> through the <strong>sharing<\/strong> of electrons. One carbon atom <strong>contributes four electrons<\/strong> and each of the four chlorine atoms <strong>contributes one electron<\/strong> for <strong>sharing<\/strong>.<\/li>\n<li>By doing so, one carbon atom is bonded to each of the four chlorine atoms by a <strong>shared pair<\/strong> of electrons so that all the five atoms achieve <strong>stable octet electron arrangements,<\/strong> as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110575\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-7.png\" alt=\"How is covalent bond is formed 7\" width=\"433\" height=\"573\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-7.png 433w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-7-227x300.png 227w\" sizes=\"(max-width: 433px) 100vw, 433px\" \/><\/li>\n<li>Hence, a <strong>covalent molecule,<\/strong> CCl<sub>4<\/sub>, with <strong>four single covalent bonds<\/strong> is formed.<\/li>\n<li>The formation of the tetrachloromethane molecule can also be represented by the <strong>Lewis structure<\/strong> as shown.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110577\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-8.png\" alt=\"How is covalent bond is formed 8\" width=\"419\" height=\"129\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-8.png 419w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-8-300x92.png 300w\" sizes=\"(max-width: 419px) 100vw, 419px\" \/><\/li>\n<\/ul>\n<h3><span style=\"color: #3366ff;\"><strong>B. Formation of double covalent bonds<\/strong><\/span><\/h3>\n<p><strong>Formation of oxygen molecule, O<sub>2<\/sub><\/strong><\/p>\n<ul>\n<li>An oxygen atom has an electron arrangement of 2.6. It has <strong>six valence electrons<\/strong>.<\/li>\n<li>Each oxygen atom needs two more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>As a result, <strong>two oxygen atoms<\/strong> will combine with each other. Each of these two oxygen atoms <strong>contributes two electrons<\/strong> to each other for sharing.<\/li>\n<li>By doing so, the two oxygen atoms <strong>share<\/strong> <strong>two pairs of electrons<\/strong> that bind them together, called a<strong> double covalent bond,<\/strong> as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110579\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-9.png\" alt=\"How is covalent bond is formed 9\" width=\"414\" height=\"169\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-9.png 414w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-9-300x122.png 300w\" sizes=\"(max-width: 414px) 100vw, 414px\" \/><\/li>\n<li>Hence, a covalent molecule with the molecular formula O<sub>2<\/sub> is formed.<\/li>\n<li>The formation of the oxygen molecule can be represented by the <strong>Lewis structure<\/strong> as shown below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110580\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-10.png\" alt=\"How is covalent bond is formed 10\" width=\"375\" height=\"59\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-10.png 375w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-10-300x47.png 300w\" sizes=\"(max-width: 375px) 100vw, 375px\" \/><\/li>\n<\/ul>\n<p><strong>Formation of a carbon dioxide molecule, CO<sub>2<\/sub><\/strong><\/p>\n<ul>\n<li>A carbon atom has an electron arrangement of 2.4. It has four <strong>valence electrons<\/strong>.<\/li>\n<li>Each carbon atom needs four more electrons to achieve a stable octet eletron arrangement (similar to neon).<\/li>\n<li>An oxygen atom has an electron arrangement of 2.6. It has <strong>six valence electrons<\/strong>.<\/li>\n<li>Each oxygen atom needs two more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>As a result, <strong>one carbon atom<\/strong> will combine with <strong>two oxygen atoms<\/strong> through the <strong>sharing<\/strong> of electrons. One carbon atom <strong>contributes four electrons<\/strong> and each of the two oxygen atoms <strong>contributes two electrons<\/strong> for <strong>sharing<\/strong>.<\/li>\n<li>By doing so, one carbon atom is bonded to each of the two oxygen atoms by two shared pairs of electrons so that all the three atoms achieve <strong>stable octet electron arrangements,<\/strong> as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110581\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-11.png\" alt=\"How is covalent bond is formed 11\" width=\"417\" height=\"380\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-11.png 417w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-11-300x273.png 300w\" sizes=\"(max-width: 417px) 100vw, 417px\" \/><\/li>\n<li>Hence, a covalent molecule, CO<sub>2<\/sub>, with <strong>two double covalent bonds<\/strong> is formed.<\/li>\n<li>The formation of the carbon dioxide molecule can be represented by the Lewis structure as shown below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110582\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-12.png\" alt=\"How is covalent bond is formed 12\" width=\"189\" height=\"258\" \/><\/li>\n<\/ul>\n<h3><span style=\"color: #3366ff;\"><strong>C. Formation of triple covalent bonds<\/strong><\/span><\/h3>\n<p><strong>Formation of nitrogen molecule, N<sub>2<\/sub><\/strong><\/p>\n<ul>\n<li>A nitrogen atom has an electron arrangement of 2.5. It has <strong>five valence electrons<\/strong>.<\/li>\n<li>Each nitrogen atom needs three more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>As a result, <strong>two nitrogen atoms<\/strong> will combine with each other. Each of these two nitrogen atoms <strong>contributes three electrons<\/strong> to each other for sharing.<\/li>\n<li>By doing so, the two nitrogen atoms share <strong>three pairs of electrons<\/strong> that bind them together, called a <strong>triple covalent bond,<\/strong> as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110592\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-13.png\" alt=\"How is covalent bond is formed 13\" width=\"417\" height=\"175\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-13.png 417w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-13-300x126.png 300w\" sizes=\"(max-width: 417px) 100vw, 417px\" \/><\/li>\n<li>Hence, a triple covalent bond is formed in the nitrogen molecule with the molecular formula N<sub>2<\/sub>.<\/li>\n<li>The formation of the nitrogen molecule can be represented by the <strong>Lewis structure<\/strong> as shown below.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110602\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-14.png\" alt=\"How is covalent bond is formed 14\" width=\"388\" height=\"41\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-14.png 388w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-14-300x32.png 300w\" sizes=\"(max-width: 388px) 100vw, 388px\" \/><\/li>\n<\/ul>\n<p><strong>Formation of an ethyne molecule, C<sub>2<\/sub>H<sub>2<\/sub><\/strong><\/p>\n<ul>\n<li>A carbon atom has an electron arrangement of 2.4. It has <strong>four valence electrons<\/strong>.<\/li>\n<li>Each carbon atom needs four more electrons to achieve a stable octet electron arrangement (similar to neon).<\/li>\n<li>A hydrogen atom has an electron arrangement of 1. It has <strong>one valence electron<\/strong>.<\/li>\n<li>Each hydrogen atom needs one more electron to achieve a stable duplet electron arrangement (similar to helium).<\/li>\n<li><strong>Two carbon atoms<\/strong> and <strong>two hydrogen atoms<\/strong> can combine to form an ethyne molecule, C<sub>2<\/sub>H<sub>2<\/sub> so that all the four atoms can achieve <strong>stable noble gas electron arrangements,<\/strong> as shown in Figure.<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-110604\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-15.png\" alt=\"How is covalent bond is formed 15\" width=\"434\" height=\"345\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-15.png 434w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-15-300x238.png 300w\" sizes=\"(max-width: 434px) 100vw, 434px\" \/><\/li>\n<li>In the ethyne molecule, C<sub>2<\/sub>H<sub>2<\/sub>, a<strong> triple covalent bond<\/strong> is formed between the two carbon atoms and <strong>two single covalent bonds<\/strong> are formed between the carbon and hydrogen atoms.<\/li>\n<li>The <strong>Lewis structure<\/strong> for the formation of the ethyne molecule is shown below.<img loading=\"lazy\" class=\"alignnone size-full wp-image-110605\" src=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-16.png\" alt=\"How is covalent bond is formed 16\" width=\"372\" height=\"77\" srcset=\"https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-16.png 372w, https:\/\/cbselibrary.com\/wp-content\/uploads\/2017\/05\/How-is-covalent-bond-is-formed-16-300x62.png 300w\" sizes=\"(max-width: 372px) 100vw, 372px\" \/><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>How is covalent bond is formed? &nbsp; A. Formation of a single covalent bonds Formation of chlorine molecule, Cl2 A chlorine atom has an electron arrangement of 2.8.7. It has seven valence electrons. Each chlorine atom needs one more electron to achieve a stable octet electron arrangement (similar to argon). As a result, two chlorine &#8230; <a title=\"How is covalent bond is formed?\" class=\"read-more\" href=\"https:\/\/cbselibrary.com\/covalent-bond-formed\/\" aria-label=\"More on How is covalent bond is formed?\">Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[84],"tags":[5227,5223,5224,5230,5222,5220,5225,5229,5226,5228,5221],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v17.8 (Yoast SEO v18.4.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How is covalent bond is formed? - CBSE Library<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cbselibrary.com\/covalent-bond-formed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How is covalent bond is formed?\" \/>\n<meta property=\"og:description\" content=\"How is covalent bond is formed? &nbsp; A. Formation of a single covalent bonds Formation of chlorine molecule, Cl2 A chlorine atom has an electron arrangement of 2.8.7. It has seven valence electrons. Each chlorine atom needs one more electron to achieve a stable octet electron arrangement (similar to argon). As a result, two chlorine ... 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