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Glossary

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

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For an ext information on the Visual aspects image watch the Uses and also properties section below.


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

Glossary

GroupA vertical obelisk in the periodic table. Members the a group frequently have similar properties and also electron construction in their outer shell.

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

BlockElements are organised into blocks by the orbital type in i m sorry the external electrons space found. These blocks are named for the properties spectra they produce: sharp (s), primary (p), diffusive (d), and basic (f).

Atomic numberThe variety of protons in one atom.

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

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

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

SublimationThe change of a substance directly from the solid to the gas step without passing through a liquid phase.

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

Relative atom massThe mass of an atom relative to the of carbon-12. This is roughly the sum of the variety of protons and neutrons in the nucleus. Where an ext than one isotope exists, the value given is the abundance load average.

IsotopesAtoms the the same element with different numbers that neutrons.

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