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Periodic Table

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Allotropes Some elements exist in several different structural develops, called allotropes. Each allotrope has various physical properties.

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For more information on the Visual Elements photo see the Uses and properties area listed below.

Discoextremely day 2010
Disextended by Scientists from the Joint Institute for Nuclear Research in Dubna, Russia, the Lawrence Livermore National Laboratory in The golden state, USA, and Oak Ridge National Laboratory in Tennesview, USA
Origin of the name The name describes the US state of Tennesview.


GroupA vertical column in the routine table. Members of a team commonly have actually similar properties and also electron configurations in their external shell.

PeriodA horizontal row in the periodic table. The atomic number of each element boosts by one, reading from left to ideal.

BlockElements are organised into blocks by the orbital type in which the outer electrons are discovered. These blocks are called for the characteristic spectra they produce: sharp (s), major (p), diffuse (d), and also basic (f).

Atomic numberThe variety of prolots in an atom.

Electron configurationThe arrangements of electrons above the last (closed shell) noble gas.

Melting pointThe temperature at which the solid–liquid phase readjust occurs.

Boiling point The temperature at which the liquid–gas phase adjust occurs.

SublimationThe change of a substance straight from the solid to the gas phase without passing with a liquid phase.

Density (g cm−3)Density is the mass of a substance that would fill 1 cm3 at room temperature.

Relative atomic massThe mass of an atom relative to that of carbon-12. This is around the sum of the number of protons and neutrons in the nucleus. Wbelow more than one isotope exists, the worth offered is the abundance weighted average.

IsotopesAtoms of the exact same element with different numbers of neutrons.

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CAS numberThe Chemical Abstracts Service regisattempt number is a unique identifier of a specific chemical, designed to proccasion confusion arising from various languperiods and also naming units.