{"id":149312,"date":"2022-03-21T10:13:18","date_gmt":"2022-03-21T04:43:18","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/first-20-elements-importance-and-atomic-number\/"},"modified":"2023-12-04T16:37:10","modified_gmt":"2023-12-04T11:07:10","slug":"chemistry-first-20-elements-of-periodic-table","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/","title":{"rendered":"First 20 Elements of Periodic Table"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#First_20_Elements_of_Periodic_Table\" title=\"First 20 Elements of Periodic Table\">First 20 Elements of Periodic Table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#Mnemonic_to_Remember_First_20_Elements\" title=\"Mnemonic to Remember First 20 Elements\">Mnemonic to Remember First 20 Elements<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#Importance_of_the_First_20_Elements_of_Periodic_Table\" title=\"Importance of the First 20 Elements of Periodic Table\">Importance of the First 20 Elements of Periodic Table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#Noble_Gas_in_First_20_Elements_of_Periodic_Table\" title=\"Noble Gas in First 20 Elements of Periodic Table\">Noble Gas in First 20 Elements of Periodic Table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#FAQs_on_the_First_20_Elements_of_Periodic_Table\" title=\"FAQs on the First 20 Elements of Periodic Table\">FAQs on the First 20 Elements of Periodic Table<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#What_are_the_first_20_elements_in_order\" title=\"What are the first 20 elements in order?\">What are the first 20 elements in order?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#Define_Element_Symbols_and_Numbers\" title=\"Define Element Symbols and Numbers?\">Define Element Symbols and Numbers?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#Why_are_the_first_20_elements_so_important\" title=\"Why are the first 20 elements so important?\">Why are the first 20 elements so important?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#Which_of_the_first_20_elements_do_not_form_compounds_easily_and_why\" title=\"Which of the first 20 elements do not form compounds easily and why?\">Which of the first 20 elements do not form compounds easily and why?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/first-20-elements-of-periodic-table\/#How_many_periods_are_in_the_periodic_table\" title=\"How many periods are in the periodic table?\">How many periods are in the periodic table?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>The<strong> First 20 elements of Periodic Table<\/strong> provide a useful introduction to different groups of elements. These first 20 elements play a role in many everyday chemical activities. Among them, we have metals like Lithium, Beryllium, Sodium, Magnesium, Aluminium, Potassium, and Calcium. Additionally, there are non-metals such as Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorus, Sulfur, Chlorine, and Argon among the first 20 elements.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-698155\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/MicrosoftTeams-image-5.jpg\" alt=\"First 20 Elements of Periodic Table\" width=\"1280\" height=\"720\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/MicrosoftTeams-image-5.jpg 1280w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/MicrosoftTeams-image-5-300x169.jpg 300w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/MicrosoftTeams-image-5-1024x576.jpg 1024w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/MicrosoftTeams-image-5-768x432.jpg 768w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"First_20_Elements_of_Periodic_Table\"><\/span>First 20 Elements of Periodic Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"table-responsive\">\n<table class=\"table table-bordered table-striped\" cellspacing=\"0\" cellpadding=\"5\">\n<tbody>\n<tr style=\"background-color: #89cff0; color: black;\">\n<td><strong>Atomic Number<\/strong><\/td>\n<td><strong>Element<\/strong><\/td>\n<td><strong>Symbol<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">1<\/td>\n<td>Hydrogen<\/td>\n<td>H<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">2<\/td>\n<td>Helium<\/td>\n<td>He<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">3<\/td>\n<td>Lithium<\/td>\n<td>Li<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">4<\/td>\n<td>Beryllium<\/td>\n<td>Be<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">5<\/td>\n<td>Boron<\/td>\n<td>B<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">6<\/td>\n<td>Carbon<\/td>\n<td>C<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">7<\/td>\n<td>Nitrogen<\/td>\n<td>N<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">8<\/td>\n<td>Oxygen<\/td>\n<td>O<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">9<\/td>\n<td>Fluorine<\/td>\n<td>F<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">10<\/td>\n<td>Neon<\/td>\n<td>Ne<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">11<\/td>\n<td>Sodium<\/td>\n<td>Na<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">12<\/td>\n<td>Magnesium<\/td>\n<td>Mg<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">13<\/td>\n<td>Aluminium<\/td>\n<td>Al<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">14<\/td>\n<td>Silicon<\/td>\n<td>Si<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">15<\/td>\n<td>Phosphorus<\/td>\n<td>P<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">16<\/td>\n<td>Sulphur<\/td>\n<td>S<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">17<\/td>\n<td>Chlorine<\/td>\n<td>Cl<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">18<\/td>\n<td>Argon<\/td>\n<td>Ar<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">19<\/td>\n<td>Potassium<\/td>\n<td>K<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">20<\/td>\n<td>Calcium<\/td>\n<td>Ca<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Mnemonic_to_Remember_First_20_Elements\"><\/span>Mnemonic to Remember First 20 Elements<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Using memory tricks called Mnemonic words can help you remember and recall words and their meanings more easily. Here&#8217;s a Mnemonic guide for the initial 20 elements on the periodic table:<\/p>\n<div class=\"table-responsive\">\n<table class=\"table table-bordered table-striped\" cellspacing=\"0\" cellpadding=\"5\">\n<tbody>\n<tr style=\"background-color: #89cff0; color: black;\">\n<td><strong>Element Name<\/strong><\/td>\n<td><strong>Symbols<\/strong><\/td>\n<td><strong>Mnemonic<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Hydrogen<\/td>\n<td>H<\/td>\n<td>Hi<\/td>\n<\/tr>\n<tr>\n<td>Helium<\/td>\n<td>Hi<\/td>\n<td>Hello<\/td>\n<\/tr>\n<tr>\n<td>Lithium<\/td>\n<td>Li<\/td>\n<td>Listen<\/td>\n<\/tr>\n<tr>\n<td>Beryllium<\/td>\n<td>Be<\/td>\n<td>B<\/td>\n<\/tr>\n<tr>\n<td>Boron<\/td>\n<td>B<\/td>\n<td>B<\/td>\n<\/tr>\n<tr>\n<td>Carbon<\/td>\n<td>C<\/td>\n<td>C<\/td>\n<\/tr>\n<tr>\n<td>Nitrogen<\/td>\n<td>N<\/td>\n<td>News<\/td>\n<\/tr>\n<tr>\n<td>Oxygen<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<\/tr>\n<tr>\n<td>Fluorine<\/td>\n<td>F<\/td>\n<td>F<\/td>\n<\/tr>\n<tr>\n<td>Neon<\/td>\n<td>Ne<\/td>\n<td>New Zealand<\/td>\n<\/tr>\n<tr>\n<td>Sodium<\/td>\n<td>Na<\/td>\n<td>Nagaland<\/td>\n<\/tr>\n<tr>\n<td>Magnesium<\/td>\n<td>Mg<\/td>\n<td>Meghalaya<\/td>\n<\/tr>\n<tr>\n<td>Aluminum<\/td>\n<td>Al<\/td>\n<td>All<\/td>\n<\/tr>\n<tr>\n<td>Silicon<\/td>\n<td>Si<\/td>\n<td>Senior<\/td>\n<\/tr>\n<tr>\n<td>Phosphorous<\/td>\n<td>P<\/td>\n<td>Public<\/td>\n<\/tr>\n<tr>\n<td>Sulfur<\/td>\n<td>S<\/td>\n<td>Schools<\/td>\n<\/tr>\n<tr>\n<td>Chlorine<\/td>\n<td>Cl<\/td>\n<td>Closed<\/td>\n<\/tr>\n<tr>\n<td>Argon<\/td>\n<td>Ar<\/td>\n<td>Around<\/td>\n<\/tr>\n<tr>\n<td>Potassium<\/td>\n<td>K<\/td>\n<td>Kargil<\/td>\n<\/tr>\n<tr>\n<td>Calcium<\/td>\n<td>Ca<\/td>\n<td>Ca<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Importance_of_the_First_20_Elements_of_Periodic_Table\"><\/span>Importance of the First 20 Elements of Periodic Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The <strong>first 20 elements in the periodic table<\/strong> are really important for everyday life. Let&#8217;s talk about why some of these elements are so crucial:<\/p>\n<ol>\n<li><strong>Oxygen (O):<\/strong> We all know we need oxygen to breathe. It&#8217;s also produced by plants during photosynthesis.<\/li>\n<li><strong>Carbon (C):<\/strong> About 18% of our bodies are made up of carbon. It&#8217;s found in important things like proteins, sugars, and glucose. We also find carbon in fossil fuels like petroleum and natural gas (CNG).<\/li>\n<li><strong>Aluminium (Al):<\/strong> Aluminum is soft and can be shaped easily. That&#8217;s why it&#8217;s used to make things like airplane parts and kitchen utensils.<\/li>\n<li><strong>Calcium (Ca):<\/strong> Calcium is vital for keeping our bones strong.<\/li>\n<li><strong>Silicon (Si):<\/strong> Silicon works like a switch in electronics and is used in computer chips.<\/li>\n<li><strong>Phosphorus (P):<\/strong> Phosphorus is a part of ATP, which is like the body&#8217;s energy currency. It&#8217;s also used in the military to make certain weapons.<\/li>\n<\/ol>\n<p><a href=\"https:\/\/infinitylearn.com\/surge\/topics\/modern-periodic-table\/\"> <button class=\"btn btn-primary\" style=\"width: 100%; cursor: pointer;\" type=\"button\">Modern Periodic Table<\/button> <\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Noble_Gas_in_First_20_Elements_of_Periodic_Table\"><\/span>Noble Gas in First 20 Elements of Periodic Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><a href=\"https:\/\/infinitylearn.com\/surge\/chemistry\/what-are-noble-gases\/\">Noble gases<\/a><\/strong>, also called inert gases, are elements that don&#8217;t react much with other elements. These gases were found later than some other elements.<\/p>\n<p>In the first 20 elements, there are three noble gases:<\/p>\n<ol>\n<li><em><strong>Helium (He) with Atomic Number 2<\/strong><\/em><\/li>\n<li><em><strong>Neon (Ne) with Atomic Number 10<\/strong><\/em><\/li>\n<li><em><strong>Argon (Ar) with Atomic Number 18<\/strong><\/em><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"FAQs_on_the_First_20_Elements_of_Periodic_Table\"><\/span>FAQs on the First 20 Elements of Periodic Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"What_are_the_first_20_elements_in_order\"><\/span>What are the first 20 elements in order?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tH \u2013 Hydrogen He \u2013 Helium Li \u2013 Lithium Be \u2013 Beryllium B \u2013 Boron C \u2013 Carbon N \u2013 Nitrogen O \u2013 Oxygen F \u2013 Fluorine Ne \u2013 Neon Na \u2013 Sodium Mg \u2013 Magnesium Al \u2013 Aluminium Si \u2013 Silicon P \u2013 Phosphorus S \u2013 Sulphur Cl \u2013 Chlorine Ar \u2013 Argon K \u2013 Potassium Ca \u2013 Calcium\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Define_Element_Symbols_and_Numbers\"><\/span>Define Element Symbols and Numbers?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tAn element's atomic number tells us how many protons are in its nucleus. The element symbol is a short way to write its name, often just one or two letters. Sometimes, the symbol can come from an older name, like 'K' for kalium.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Why_are_the_first_20_elements_so_important\"><\/span>Why are the first 20 elements so important?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tApproximately 99% of your body's weight comes from six elements. The initial 20 elements give a good idea about different groups of elements. They are also commonly used in chemical reactions.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Which_of_the_first_20_elements_do_not_form_compounds_easily_and_why\"><\/span>Which of the first 20 elements do not form compounds easily and why?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tWith the exception of helium, noble gases have full s and p outer electron shells. Because of this, they don't readily take part in chemical reactions or bond with other elements.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"How_many_periods_are_in_the_periodic_table\"><\/span>How many periods are in the periodic table?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\t The periodic table shows us all the different kinds of chemicals known to scientists. These chemicals are arranged in rows based on how heavy their atoms are, and there are seven rows in total. In the middle, there are special rows for some elements called 'lanthanoids' and 'actinoids.' These elements have specific numbers, like lanthanum (number 57) to lutetium (number 71) in one group and actinium (number 89) to lawrencium (number 103) in another group.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\n<script type=\"application\/ld+json\">\n\t{\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What are the first 20 elements in order?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"H \u2013 Hydrogen He \u2013 Helium Li \u2013 Lithium Be \u2013 Beryllium B \u2013 Boron C \u2013 Carbon N \u2013 Nitrogen O \u2013 Oxygen F \u2013 Fluorine Ne \u2013 Neon Na \u2013 Sodium Mg \u2013 Magnesium Al \u2013 Aluminium Si \u2013 Silicon P \u2013 Phosphorus S \u2013 Sulphur Cl \u2013 Chlorine Ar \u2013 Argon K \u2013 Potassium Ca \u2013 Calcium\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Define Element Symbols and Numbers?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"An element's atomic number tells us how many protons are in its nucleus. The element symbol is a short way to write its name, often just one or two letters. Sometimes, the symbol can come from an older name, like 'K' for kalium.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Why are the first 20 elements so important?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Approximately 99% of your body's weight comes from six elements. The initial 20 elements give a good idea about different groups of elements. They are also commonly used in chemical reactions.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Which of the first 20 elements do not form compounds easily and why?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"With the exception of helium, noble gases have full s and p outer electron shells. Because of this, they don't readily take part in chemical reactions or bond with other elements.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"How many periods are in the periodic table?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The periodic table shows us all the different kinds of chemicals known to scientists. These chemicals are arranged in rows based on how heavy their atoms are, and there are seven rows in total. In the middle, there are special rows for some elements called 'lanthanoids' and 'actinoids.' These elements have specific numbers, like lanthanum (number 57) to lutetium (number 71) in one group and actinium (number 89) to lawrencium (number 103) in another group.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t\t\t\t]\n\t}\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>The First 20 elements of Periodic Table provide a useful introduction to different groups of elements. These first 20 elements [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"First 20 Elements of Periodic Table","_yoast_wpseo_title":"First 20 Elements of Periodic Table with Atomic Number & Symbols","_yoast_wpseo_metadesc":"Discover the first 20 elements of the periodic table, including their names, symbols, atomic numbers, and key properties.","custom_permalink":"chemistry\/first-20-elements-of-periodic-table\/"},"categories":[12],"tags":[7803],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>First 20 Elements of Periodic Table with Atomic Number &amp; Symbols<\/title>\n<meta name=\"description\" content=\"Discover the first 20 elements of the periodic table, including their names, symbols, atomic numbers, and key properties.\" 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