Biology

barium (Ba)

Term: barium (Ba)

Literally meaning: ?pertaining to heavy?

Origin: Anc Greek

?????/varys(=heavy)

The element was called barium because it is found in baryte(BaSO₄₎, a mineral which had been given its name because of its high

Coined/History

Barium was first isolated by English chemist Sir Humphry Davy (1778-1829) through the electrolysis of molten baryta (BaO), similar to the method he used to isolate strontium.

Definition

Barium is a chemical element with atomic number 56 and atomic mass 137.33. It is a soft, silvery-white metal which is never found in nature since it reacts with oxygen in the air forming BaO and with water, forming Ba(OH)2 and hydrogen gas. Barium has among others many medical applications. It is used also in vacuum tubes to remove the last traces of gases.

- Actinium (ac)
Term: actinium (Ac)Literally meaning: ?pertaining to ray?Origin: 'á???? actis(genitive á??[é???/actinos)(=ray, beam) The element was named after its power of emitting energy in the form of rays suchas radioactive ?radium? which comes from latin...

- Iridium (ir)
Term: iridium (Ir)Literally meaning: ?pertaining to rainbow?Origin=é??? (gen ??????)/iris(=rainbow)>????/ero(=announce, say)Iridium element named because of variety of colors which it gives while dissolving in marine acid. Coined/History ...

- Lanthanum (la)
Term: lanthanum (La)Literally meaning: ?pertaining to hidden?Origin: ???????/lanthano(= to be hidden, to escape notice) .The element called lanthanum because it is ?hidden? in rare minerals. Coined/History Lanthanum was isolated in the mineral...

- Molybdenium (mo)
Term: molybdenium (Mo)Literally meaning: ?pertaining to lead?Origin: Anc Greek????????/molybdos(=lead)Coined/History In 1778, Swedish chemist Carl Wilhelm Scheele (1742-1786) claimed that molybdena (MoS2) was an ore of a distinct new element,...

- Krypton (kr)
Term: krypton (Kr) Literally meaning: ?hidden?Origin: Anc Greek??????/crypto(=hide, cover)Coined/History The element was discovered in 1898 by Scottish chemist (sir) William Ramsey (1852-1916) and his assistant English chemist Morris...

Biology