Barium (Ba), element 56 – Learn Acer periodic table

Alkaline earth metal, atomic number 56.

Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element.

Symbol Ba. Atomic mass 137.3277 u. Group 2, period 6. Electron configuration [Xe] 6s2. Electrons per shell 2, 8, 18, 18, 8, 2. State at room temperature: Solid. Melting point 726.9 °C, boiling point 1844.8 °C. Discovered by Carl Wilhelm Scheele.

Element data from Wikipedia, CC BY-SA 3.0.

Barium (Ba), element 56 – Learn Acer periodic table

Barium

Facts