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Glossary

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

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For much more information ~ above the Visual facets image check out the Uses and properties section below.


Discovery day 1860
discovered by Gustav Kirchhoff and Robert Bunsen
beginning of the name The name comes from the Latin "caesius", meaning sky blue, and also derived native its fire colour.
Allotropes

Glossary

GroupA vertical column in the regular table. Members the a group generally have comparable properties and electron construction in their outer shell.

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

BlockElements room organised into blocks by the orbital form in i beg your pardon the external electrons room found. This blocks are called for the properties spectra they produce: sharp (s), primary (p), diffuse (d), and basic (f).

Atomic numberThe variety of protons in an atom.

Electron configurationThe species of electrons over the critical (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 transition 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 substance that would certainly fill 1 cm3 in ~ room temperature.

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

IsotopesAtoms of the same element with various numbers that neutrons.

See more: The Family Under The Bridge Book, The Family Under The Bridge

CAS numberThe chemistry Abstracts service registry number is a unique identifier the a specific chemical, design to prevent confusion emerging from various languages and naming systems.