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allotrope Some aspects exist in several various structural forms, called allotropes. Each allotrop has various physical properties.

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For an ext information top top the Visual facets image view the Uses and properties section below.

Discovery day 1781
uncovered by Peter Jacob Hjelm
beginning of the name The surname is obtained from the Greek "molybdos" definition lead.


GroupA vertical tower in the periodic table. Members of a group commonly have similar properties and also electron configurations in their outer shell.

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

BlockElements are organised into blocks by the orbital type in i m sorry the outer electrons are found. These blocks are called for the characteristic spectra castle produce: sharp (s), major (p), diffuse (d), and an essential (f).

Atomic numberThe number of protons in an atom.

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

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

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

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

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

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

IsotopesAtoms that the same element with different numbers that neutrons.

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CAS numberThe chemical Abstracts company registry number is a distinctive identifier that a particular chemical, designed to prevent confusion arising from different languages and also naming systems.