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Some authors classify these elements as main-group elements because the valence electrons are in ns 2 orbitals. Nevertheless, they share many characteristics with the neighboring group 11 elements on the periodic table, which are almost universally considered to be transition elements. For example, zinc shares many characteristics with the ...
Because it does not blend geochemically with those elements that constitute the majority of the crustal mass, mercury ores can be extraordinarily concentrated considering the element's abundance in ordinary rock. The richest mercury ores contain up to 2.5% mercury by mass, and even the leanest concentrated deposits are at least 0.1% mercury (12,000 times average crustal abundance). It is found ...
Element is a global Testing Inspection and Certification (TIC) company headquartered in London. It specialises in materials testing and provision of certification schemes in building material, aerospace, transportation, health sciences, oil and gas, and fire protection. The company was ranked as number 15 in the Sunday Times Top Track 250 ...
Basic Element is a Swedish Eurodance hip-hop group formed in 1992. The group returned in 2005 and is still releasing new material. The group returned in 2005 and is still releasing new material. From Malmö in Sweden, the group originally consisted of rapper /singer Peter Thelenius (Petrus), and keyboardist Cesar Zamini, accordion and vocalist Zetma Prenbo.
The main group includes the elements (except hydrogen, which is sometimes not included [citation needed]) in groups 1 and 2 , and groups 13 to 18 . The s-block elements are primarily characterised by one main oxidation state, and the p-block elements, when they have multiple oxidation states, often have common oxidation states separated by two units.
The boron group are the chemical elements in group 13 of the periodic table, consisting of boron (B), aluminium (Al), gallium (Ga), indium (In), thallium (Tl) and nihonium (Nh). This group lies in the p-block of the periodic table. The elements in the boron group are characterized by having three valence electrons. [1]
