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periodic Table

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allotropes Some facets exist in several different structural forms, dubbed allotropes. Each allotrop has various physical properties.

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For an ext information ~ above the Visual facets image view the Uses and properties section below.

Discovery date 1783
found by Franz-Joseph Müller von Reichenstein
origin of the name The name is acquired from the Latin "tellus", an interpretation Earth.


GroupA vertical obelisk in the regular table. Members the a group frequently have comparable properties and also electron configuration in their external shell.

PeriodA horizontal row in the periodic table. The atomic number of each facet increases by one, analysis from left come right.

BlockElements space organised into blocks through the orbital form in i m sorry the outer electrons room found. This blocks are named for the characteristics spectra lock produce: sharp (s), principal (p), diffusive (d), and basic (f).

Atomic numberThe number of protons in an atom.

Electron configurationThe species of electrons over the last (closed shell) noble gas.

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

Boiling point The temperature at which the liquid–gas phase change 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 massive of a problem that would fill 1 cm3 at room temperature.

Relative atomic massThe mass of an atom loved one to that of carbon-12. This is about the sum of the variety of protons and neutrons in the nucleus. Where an ext than one isotope exists, the value offered is the abundance weight average.

IsotopesAtoms the the same facet with various numbers of neutrons.

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CAS numberThe chemical Abstracts company registry number is a distinct identifier that a specific chemical, design to prevent confusion arising from various languages and also naming systems.