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Glossary

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

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For more information on the Visual aspects image view the Uses and properties ar below.


Discovery day 1807
found by Humphry Davy
beginning of the name The surname is obtained from the English native "potash".
Allotropes

Glossary

GroupA vertical tower in the regular table. Members of a group commonly have comparable properties and also electron configurations in their external shell.

PeriodA horizontal row in the regular table. The atomic number of each aspect increases through one, reading from left to right.

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

Atomic numberThe number of protons in an atom.

Electron configurationThe kinds of electrons over the critical (closed shell) noble gas.

Melting pointThe temperature in ~ which the solid-fluid phase readjust occurs.

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

SublimationThe change of a substance straight from the solid come the gas phase without passing v a liquid phase.

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

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

IsotopesAtoms the the same facet with different numbers the neutrons.

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CAS numberThe chemical Abstracts business registry number is a distinct identifier that a certain chemical, designed to protect against confusion developing from different languages and also naming systems.