Main Group Element

main">

In chemistry and atomic physics, main group elements are elements in groups (periodic columns) whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements. Main group elements include elements (except hydrogen) in groups 1 and 2 (s-block), and groups 13 to 18 (p-block). Group 12 elements are usually considered to be transition metals; however, zinc (Zn), cadmium (Cd), and mercury (Hg) share some properties of both groups, and some scientists believe they should be included as main group elements.

In older nomenclature the main group elements are groups IA and IIA, and groups IIIB to 0 (CAS groups IIIA to VIIIA).

Main group elements (with some of the lighter transition metals) are the most abundant elements on the earth, in the solar system, and in the universe. They are sometimes called the representative elements.


Other articles related to "group, groups, element, main group element, elements":

U2
... Formed in 1976, the group consists of Bono (vocals and guitar), The Edge (guitar, keyboards, and vocals), Adam Clayton (bass guitar), and Larry Mullen, Jr ... Throughout the group's musical pursuits, they have maintained a sound built on melodic instrumentals, highlighted by The Edge's timbrally varied guitar sounds and ... stagnation and late-1980s criticism of their earnest image and musical direction, the group reinvented themselves with their 1991 hit album Achtung Baby and the accompanying Zoo TV Tour ...
Group Homomorphism
... In mathematics, given two groups (G, *) and (H, ·), a group homomorphism from (G, *) to (H, ·) is a function h G → H such that for all u and v in G it ... From this property, one can deduce that h maps the identity element eG of G to the identity element eH of H, and it also maps inverses to inverses in the sense ... A more recent trend is to write group homomorphisms on the right of their arguments, omitting brackets, so that h(x) becomes simply x h ...
Valence Electron - Electron Configuration
... For a main group element, the number of valence electrons that it may have depends on the electron configuration in a simple way ... For a main group element, a valence electron is defined as an electron that resides in the electronic shell of highest principal quantum number n ... For zinc (and succeeding elements), the 3d subshell is complete and a 3d electron is considered to be a core electron ...
8 Ball Bunny - Censorship
... edited to remove the part where one of the natives runs to warn the group of "bwana" Humphrey Bogart coming and the group scattering ... shot of Bogart's feet while the sound of the group muttering and fleeing was heard ...

Famous quotes containing the words element, main and/or group:

    The geometry of landscape and situation seems to create its own systems of time, the sense of a dynamic element which is cinematising the events of the canvas, translating a posture or ceremony into dynamic terms. The greatest movie of the 20th century is the Mona Lisa, just as the greatest novel is Gray’s Anatomy.
    —J.G. (James Graham)

    Whoever considers morality the main objective of human existence, seems to me like a person who defines the purpose of a clock as not going wrong. The first objective for a clock, is, however, that it does run; not going wrong is an additional regulative function. If not a watch’s greatest accomplishment were not going wrong, unwound watches might be the best.
    Franz Grillparzer (1791–1872)

    A little group of willful men, representing no opinion but their own, have rendered the great government of the United States helpless and contemptible.
    Woodrow Wilson (1856–1924)