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The exceptional facts about earth metal Terbium

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The exceptional facts about earth metal Terbium

Post  bejoy on Mon Jan 29, 2018 12:26 am

The chemical element terbium is categorised as a lanthanide which is also known for the rare earth metal. It was discovered by Carl Gustaf Mosander in 1843. Terbium is a silvery white metal which is malleable, ductile, and soft that can be cut with a knife. Being the 9th member of the lanthanide series, terbium is a quite electropositive metal which reacts with water, giving rise to hydrogen gas. Terbium is certainly not found in environment as a free element.

Chemical properties of Terbium

The general oxidation state of terbium is +3, which is Tb2O3.

The +4 state is known in TbO2 and TbF4.

Terbium burns quickly forming a mixed terbium (III,IV) oxides.

Terbium forms only trivalent ions in solutions.

Terbium is fairly electropositive and responds gradually with cold water and very rapidly with hot water to give rise to terbium hydroxide

Terbium metal responds with all halogens, giving rise to white trihalides.

Terbium melts down quickly in dilute sulfuric acid producing the solutions holding the pale pink terbium(III) ions, that exist as a [Tb(OH2)9]3+ compounds.

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