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)
Ionic radius: 143ppm
ionization energy: 1st 502.9 2nd 965.2 3rd 3600
# of ions:Ba = +2. PO4 = -3. Formula = Ba3(PO4)2.
Common form:Barium sulfate (BaSO4)
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.