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allotropes Some aspects exist in several various structural forms, called allotropes. Each allotrope has different physical properties.

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For much more information top top the Visual facets image view the Uses and properties section below.

Discovery date 1783
uncovered by Franz-Joseph Müller von Reichenstein
origin of the name The surname is derived from the Latin "tellus", definition Earth.


GroupA vertical column in the periodic table. Members the a group generally have similar properties and also electron construction in their external shell.

PeriodA horizontal heat in the regular table. The atomic variety of each facet increases by one, analysis from left come right.

BlockElements are organised into blocks by the orbital form in i m sorry the outer electrons room found. These blocks are called for the properties spectra lock produce: sharp (s), primary (p), diffusive (d), and an essential (f).

Atomic numberThe number of protons in one atom.

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

Melting pointThe temperature at which the solid-fluid phase change occurs.

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

SublimationThe change of a substance directly from the solid come the gas step without passing with a fluid phase.

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

Relative atomic massThe fixed of an atom loved one to that of carbon-12. This is around the sum of the number of protons and neutrons in the nucleus. Where much more than one isotope exists, the value provided is the abundance load average.

IsotopesAtoms of the same facet with various numbers the neutrons.

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CAS numberThe chemical Abstracts business registry number is a distinctive identifier that a particular chemical, design to prevent confusion developing from various languages and also naming systems.