Yb Ytterbium 70 173.04 6 f 70 819.0 1196.0 [Xe] 4f14 6s2 2 8 18 32 8 2 6.97 0.00028% Silver Cubic: Face centered {"1":"603.4","2":"1174.8","3":"2417","4":"4203"} 603 50 +3,2 1.94 24.8 7.7 128.0 0.155 34.9 0 Solid, Conductor, Lanthanide, Stable, Natural i-TUR-bi-em Silvery, lustrous, malleable, and ductile metal. Used in metallurgical and chemical experiments. Found in minerals such as yttria, monazite, gadolinite, and xenotime. Monazite is often 50% rare earth by weight and typically 0.03% ytterbium. Rp7-yNvOV4I Ytterbium

Barium was identified as a new element in 1774 by Carl Wilhelm Scheele.

Barium was first isolated by electrolysis of molten barium salts in 1808, by Sir Humphry Davy in England.

Robert Bunsen and Augustus Matthiessen obtained pure barium by electrolysis of a molten mixture of barium chloride and ammonium chloride. From the Greek word barys, heavy 70 1878 Jean de Marignac Switzerland Named after the village of "Ytterby" near Vaxholm in Sweden

Water-soluble barium compounds are poisonous

At low doses, barium acts as a muscle stimulant

Barium is used as a flashed getter in vacuum tubes to remove the last traces of gases.

It is often used in barium-nickel alloys for spark plug wire.

Barium sulfate is important to the petroleum industry as a drilling fluid in oil and gas wells.

Barium is also used in medicine to detect abnormalities in the digestive system.