Image: Halliburton. Downhole camera technology puts eyes underground, enhancing a company's understanding of what is going on within the furthest depths of production and helping operators make important decisions that benefit from the all too valuable sense of sight.
Barium was discovered by Sir Humphrey Davy at 1808 in England. Origin of name: from the Greek word barys meaning heavy Baryta (barium oxide, BaO) was distinguished from lime (calcium oxide, CaO) by Scheele in 1774.
January 28, 2016. Barium is an atom of the chemical element barium with symbol Ba and atomic number 56. The electronic structure of the barium ground states is normally written. 1s2.2s2.2px2.2py2.2pz2.3s2.3px2.3py2.3pz2.3d10. 4s2. 4p6.4d10.