Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Boron_group> ?p ?o }
- Boron_group abstract "The boron group are the chemical elements in group 13 of the periodic table, comprising boron (B), aluminium (Al), gallium (Ga), indium (In), thallium (Tl), and perhaps also the chemically uncharacterized ununtrium (Uut). The elements in the boron group are characterized by having three electrons in their outer energy levels (valence layers). These elements have also been referred to as icosagens and triels.Boron is classified as a metalloid while the rest, with the possible exception of ununtrium, are considered post-transition metals. Ununtrium has not yet been confirmed to be post-transition, due to relativistic effects, might not turn out to be one. Boron occurs sparsely, probably because bombardment by the subatomic particles produced from natural radioactivity disrupts its nuclei. Aluminium occurs widely on earth, and indeed is the third most abundant element in the Earth's crust (8.3%). Gallium is found in the earth with an abundance of 13 ppm. Indium is the 61st most abundant element in the earth's crust, and thallium is found in moderate amounts throughout the planet. Ununtrium is never found in nature and therefore is termed a synthetic element.Several group 13 elements have biological roles in the ecosystem. Boron is a trace element in humans and is essential for some plants. Lack of boron can lead to stunted plant growth, while an excess can also cause harm by inhibiting growth. Aluminium has neither a biological role nor significant toxicity and is considered safe. Indium and gallium can stimulate metabolism; gallium is credited with the ability to bind itself to iron proteins. Thallium is highly toxic, interfering with the function of numerous vital enzymes, and has seen use as a pesticide.".
- Boron_group wikiPageExternalLink oxide.
- Boron_group wikiPageExternalLink index.php?search=Aluminum&searchmode=none.
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- Boron_group wikiPageExternalLink reactivity-elements.php.
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- Boron_group wikiPageWikiLink Abundance_of_elements_in_Earths_crust.
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- Boron_group wikiPageWikiLink Aluminium_oxide.
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- Boron_group wikiPageWikiLink Fluoborite.
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- Boron_group wikiPageWikiLink Gallite.
- Boron_group wikiPageWikiLink Gallium.
- Boron_group wikiPageWikiLink Gallium(III)_oxide.
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- Boron_group wikiPageWikiLink Humphry_Davy.
- Boron_group wikiPageWikiLink Hydrogen.
- Boron_group wikiPageWikiLink Indigo_dye.