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periodic Table

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

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For more information on the Visual elements image check out the Uses and also properties section below.

Discovery day established as an aspect in 1746, but known come the Greeks and also Romans prior to 20BC.
discovered by Andreas Marggraf
beginning of the name The surname is acquired from the German, "zinc", i m sorry may in turn be obtained from the Persian native "sing", an interpretation stone.


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

PeriodA horizontal row in the periodic table. The atomic number of each facet increases by one, analysis from left to right.

BlockElements room organised right into blocks through the orbital form in which the outer electrons space found. These blocks are named for the characteristics spectra castle produce: spicy (s), primary (p), diffuse (d), and an essential (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 readjust occurs.

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

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

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

Relative atomic massThe mass of one atom relative to that of carbon-12. This is approximately the amount of the number of protons and neutrons in the nucleus. Where more than one isotope exists, the value given is the abundance weight average.

IsotopesAtoms of the same facet with different numbers that neutrons.

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CAS numberThe chemical Abstracts organization registry number is a unique identifier of a particular chemical, design to avoid confusion emerging from various languages and also naming systems.