{"id":2391,"date":"2025-06-27T14:08:37","date_gmt":"2025-06-27T08:38:37","guid":{"rendered":"https:\/\/texpertssolutions.com\/notes\/?p=2391"},"modified":"2025-06-29T16:44:54","modified_gmt":"2025-06-29T11:14:54","slug":"oxygen-o","status":"publish","type":"post","link":"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/oxygen-o\/","title":{"rendered":"Oxygen (O)"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\ud83d\udd39 Basic Information<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Element Name<\/strong>: Oxygen<\/li>\n\n\n\n<li><strong>Discovered By<\/strong>: Carl Wilhelm Scheele &amp; Joseph Priestley (independently)<\/li>\n\n\n\n<li><strong>Year of Discovery<\/strong>: 1774<\/li>\n\n\n\n<li><strong>Category<\/strong>: Non-metal<\/li>\n\n\n\n<li><strong>Group<\/strong>: 16 (Group VIA \u2013 Chalcogens)<\/li>\n\n\n\n<li><strong>State at Room Temperature<\/strong>: Gas (colorless and odorless) \ud83d\udca8<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Oxygen is the <strong>most essential element for life<\/strong> as we know it. It&#8217;s a <strong>colorless, odorless gas<\/strong> that makes up about <strong>21% of the Earth&#8217;s atmosphere<\/strong> and is needed by most living organisms to breathe.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd38 Chemical Properties<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chemical Symbol<\/strong>: O<\/li>\n\n\n\n<li><strong>Atomic Number<\/strong>: 8<\/li>\n\n\n\n<li><strong>Atomic Mass<\/strong>: ~15.999 u<\/li>\n\n\n\n<li><strong>Valency<\/strong>: 2<\/li>\n\n\n\n<li><strong>Electronic Configuration<\/strong>: 1s\u00b2 2s\u00b2 2p\u2074<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Oxygen has <strong>six electrons in its outer shell<\/strong> and readily forms compounds with nearly all other elements. It most commonly forms <strong>oxides<\/strong>, like <strong>H\u2082O (water)<\/strong> and <strong>CO\u2082 (carbon dioxide)<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcd8 Basic Things to Know<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Oxygen is found in the <strong>air we breathe<\/strong>, the <strong>water we drink<\/strong>, and the <strong>rocks beneath our feet<\/strong>. It\u2019s the <strong>third most abundant element<\/strong> in the universe and makes up <strong>about 65% of the human body by mass<\/strong>! \ud83d\udca7\ud83e\udec1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In nature, oxygen usually exists as <strong>O\u2082 (diatomic)<\/strong> or <strong>O\u2083 (ozone)<\/strong>. O\u2082 is what we breathe, while O\u2083 protects Earth from harmful UV rays. \ud83c\udf0d<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udd14 Interesting Facts<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oxygen was once called <strong>\u201cdephlogisticated air\u201d<\/strong> by early scientists.<\/li>\n\n\n\n<li><strong>Liquid oxygen is pale blue<\/strong> and extremely cold \u2014 used in rockets! \ud83d\ude80<\/li>\n\n\n\n<li>Oxygen is <strong>very reactive<\/strong> \u2014 it supports combustion (things can\u2019t burn without it). \ud83d\udd25<\/li>\n\n\n\n<li>Plants <strong>release oxygen<\/strong> during photosynthesis, making it a key part of Earth\u2019s life cycle. \ud83c\udf31<\/li>\n\n\n\n<li>The <strong>ozone layer<\/strong> (made of O\u2083) shields us from the sun\u2019s ultraviolet radiation. \u2600\ufe0f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd27 Common Uses<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Breathing<\/strong>: Vital for <strong>humans and animals<\/strong> \u2014 used in medical oxygen tanks and respirators. \ud83e\udec1<\/li>\n\n\n\n<li><strong>Water<\/strong>: Found in <strong>H\u2082O<\/strong>, one of the most important molecules for life. \ud83d\udca7<\/li>\n\n\n\n<li><strong>Combustion<\/strong>: Used in <strong>welding, metal cutting, and rocket fuel<\/strong> systems. \ud83d\udd25<\/li>\n\n\n\n<li><strong>Healthcare<\/strong>: Used in <strong>oxygen therapy<\/strong>, hospitals, and life support systems. \ud83c\udfe5<\/li>\n\n\n\n<li><strong>Industry<\/strong>: Helps in producing <strong>steel, plastics, and chemicals<\/strong>.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcda Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Oxygen is <strong>the breath of life<\/strong> \u2014 literally! From keeping us alive to powering engines and protecting the planet, it&#8217;s one of the <strong>most important and fascinating elements<\/strong>. For students, it&#8217;s a perfect example of how <strong>chemistry supports biology, environment, and industry<\/strong> all at once. \ud83c\udf0e\ud83d\udd2c<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udd39 Basic Information Oxygen is the most essential element for life as we know it. It&#8217;s a colorless, odorless gas that makes up about 21% of the Earth&#8217;s atmosphere and is needed by most living organisms to breathe. \ud83d\udd38 Chemical Properties Oxygen has six electrons in its outer shell and readily forms compounds with nearly&#8230;<\/p>\n","protected":false},"author":1,"featured_media":2753,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[672],"tags":[656,652,653,661,647,643,648,670,666,664,662,650,651,645,660,663,655,646,657,659,658,665,642,644,668,669,667,649,671,654],"class_list":["post-2391","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-periodic-table-for-students","tag-actinides","tag-alkali-metals","tag-alkaline-earth-metals","tag-atomic-mass","tag-atomic-number","tag-chemical-elements","tag-chemical-symbols","tag-chemistry-basics","tag-chemistry-study-guide","tag-electron-configuration","tag-electronegativity","tag-element-groups","tag-element-periods","tag-element-properties","tag-halogens","tag-ionization-energy","tag-lanthanides","tag-mendeleev-periodic-table","tag-metalloids","tag-noble-gases","tag-nonmetals","tag-oxidation-states","tag-periodic-table","tag-periodic-table-elements","tag-periodic-table-explained","tag-periodic-table-facts","tag-periodic-table-for-students","tag-periodic-trends","tag-science-education","tag-transition-metals"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\ud83d\udd39 Basic Information Element Name: Oxygen Discovered By: Carl Wilhelm Scheele &amp; Joseph Priestley (independently) Year of Discovery: 1774 Category: Non-metal Group: 16 (Group VIA \u2013 Chalcogens) State at Room Temperature: Gas (colorless and odorless) \ud83d\udca8 Oxygen is the most essential element for life as we know it. 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