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periodic Table

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

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

Discovery date approx 2100BC
discovered by -
beginning of the name The name originates from the Anglo-Saxon "tin"
Allotropes White Sn, Gray Sn, Rhombic Sn


GroupA vertical pillar in the routine table. Members of a group generally have similar properties and electron configurations in their outer shell.

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

BlockElements space organised into blocks through the orbital form in i m sorry the external electrons room found. This blocks are called for the characteristic spectra they produce: sharp (s), primary (p), diffusive (d), and an essential (f).

Atomic numberThe number of protons in an atom.

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

Melting pointThe temperature at which the solid-fluid phase adjust occurs.

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

SublimationThe shift of a substance straight from the solid to the gas phase without passing through a liquid phase.

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

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

IsotopesAtoms the the same element with different numbers the neutrons.

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CAS numberThe chemistry Abstracts business registry number is a unique identifier of a certain chemical, design to stop confusion occurring from various languages and naming systems.