Europium is prepared by heating its oxide with lanthanum metal: Europium metal is quite expensive to make and sells for about $3,000 to $4,500 a kilogram ($1,350 to $2,000 a pound).

A soft, silvery metal that tarnishes quickly and reacts with water.

the government reported the discovery of large gold deposits in Lege Dimbi, also in Sidamo.

The metal is a solid material and metallic gray in color. Furthermore, the metal possess high melting and boiling points. At standard temperature and pressure, cobalt is not readily oxidized, which means it does not easily lose electrons from its surface.

cobalt can be found among the d-block elements, transition metals. It has the chemical abbreviation Co and atomic number 27.

his is the second round of mineral licensing conducted by the Afghan government, which in 2008 gave Metallurgical Corp of China rights to the Aynak copper deposit