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allotrope Some facets exist in several different structural forms, referred to as allotropes. Each allotrop has various physical properties.

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For more information top top the Visual elements image check out the Uses and properties ar below.

Discovery day 1807
discovered by Humphry Davy
beginning of the name The name is obtained from the English indigenous "potash".


GroupA vertical pillar in the regular table. Members that a group generally have comparable properties and electron construction in their external shell.

PeriodA horizontal row in the regular table. The atomic variety of each facet increases by one, reading from left to right.

BlockElements are organised into blocks by the orbital form in which the outer electrons room found. This blocks are called for the properties spectra lock produce: spicy (s), primary (p), diffuse (d), and basic (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 lpg phase change occurs.

SublimationThe shift of a substance directly from the solid to the gas phase without passing v a liquid phase.

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

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

IsotopesAtoms the the same aspect with different numbers the neutrons.

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CAS numberThe chemical Abstracts organization registry number is a distinctive identifier that a certain chemical, designed to stop confusion emerging from different languages and also naming systems.