Melting point:727°C

Boiling: 1,897°C

Longhand electron config:1s(2) 2s(2) 2p(6) 3s(2) 3p(6) 4s(2) 3d(10) 4p(6) 5s(2) 4d(10) 5p(6) 6s(2)= [Xe] 6s(2)

atomic radius:2.15

Ionic radius: 143ppm

ionization energy: 1st 502.9 2nd 965.2 3rd 3600

Ions charge:+2

# of ions:Ba = +2. PO4 = -3. Formula = Ba3(PO4)2.

Common form:Barium sulfate (BaSO4)

Alkali metal

Types of chemical bonding: reacts with water to make a barium sulfate

Who discovered: Carl Scheele

How:Alchemists in the early Middle Ages knew about some barium minerals. Smooth pebble-like stones of mineral barite. also observed a new element in Bononian phosphorus which gave a sulfate which was insoluble in water.

When; 1774 AD

Where: Bologna, Italy

Modern techniques to get it:Barium is commercially produced through the electrolysis of molten barium chloride

How its used; fireworks to give a green colouration,in medicine in the form of a Barium Meal (i.e. Barium Sulphate, BaSO4), is used as an X-Ray contrast medium. as a getter in the electronics industry, to remove the last traces of gases in vacuum tubes.

Compounds: Hydrides, flourides, chlorides, bromides, iodides, oxides, sulfides, selenides, nitrides

Abundance: it's elemental, in the Earth's crust

Where:high chemical reactivity barium is never found in nature as a free element

cost:$55 per 100g

When burnt lets off green hue or flare, that's why it's used in fireworks.

Melting point:727°C

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