Nitrogen group

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Group 15
Period
2 7
N
3 15
P
4 33
As
5 51
Sb
6 83
Bi
7 115
Uup

Group 15 of the periodic table(formerly numbered as Group Ⅴ or Group ⅤA) is also known by the collective name pnictogens.[1]

This group has the defining characteristic that all the component elements have 5 electrons in their outermost shell, that is 2 electrons in the s subshell and 3 unpaired electrons in the p subshell. They are therefore 3 electrons short of filling their outermost electron shell in their non-ionized state. The most important element of this group is nitrogen (N), which in its diatomic form is the principal component of air. Other members of the group include phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi) and ununpentium (Uup) (unconfirmed).

Binary compounds of the group can be referred to collectively as pnictides. The spelling derives from the Greek πνίγειν (pnigein), to choke or stifle, which is a property of nitrogen; they are also mnemonic for the two most common members, P and N. The name pentels (from the Latin penta, five) was also used for this group at one time, stemming from the earlier group naming convention (Group VB).

These elements are also noted for their stability in compounds due to their tendency for forming double and triple covalent bonds. This is the property of these elements which leads to their potential toxicity, most evident in phosphorus, arsenic and antimony. When these substances react with various chemicals of the body, they create strong free radicals not easily processed by the liver, where they accumulate. Paradoxically it is this strong bonding which causes nitrogen and bismuth's reduced toxicity (when in molecules), as these form strong bonds with other atoms which are difficult to split, creating very unreactive molecules. For example N2, the diatomic form of nitrogen, is used for inert atmosphere in situations where xenon or another noble gas would be prohibitively expensive.

The nitrogen group consits of two non-metals, two metalloids, and one metal. All the elements in the group are a solid at room temperatue except for Nitrogen which is a gas at room temperature.

References


Explanation of above periodic table slice:
Nonmetals Metalloids Poor metals atomic number in red are gases atomic number in black are solids solid borders are primordial elements (older than the Earth) dotted borders are radioactive, synthetic elements


ar:مجموعة نيتروجين

ast:Elementos del grupu 15 bs:15. grupa hemijskih elemenata ca:Grup del nitrogen cs:Pentely de:Stickstoffgruppeeo:Elemento de grupo 15 fr:Pnictogène ko:15족 원소 it:Gruppo dell'azoto lmo:Grupp de l'azòot nl:Stikstofgroep ja:第15族元素 nn:Gruppe 15 nds:Cheemsch Elementen vun de 15. Gruppsk:Pentely sr:15. група хемијских елемената sh:15. grupa hemijskih elemenata fi:Typpiryhmä sv:Kvävegruppen th:พีนิคโตเจน vi:Nhóm nitơ

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .

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