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Barium wi gray oxide suroondit by argon gas in a test tube.

Barium is the fift element o group twa o the periodic cairt.[1] It haes the atomic number o 56.[2]

References

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  1. "Barium - Element information, properties and uses | Periodic Table". www.rsc.org. Retrieved 27 Juin 2024.
  2. "Barium (Ba), Atomic Number 56". www.breakingatom.com (in Inglis). Retrieved 27 Juin 2024.
The periodic cairt o the elements
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
Alkali metals Alkaline yird metals Lanthanides Actinoids Transeetion elements Ither metals Metalloids Ither nane-metals Halogens Noble gases Unkent chemical properties