Equation Ba + O2 -> BaO

In the above chemical equation, Ba is the chemical symbol for Barium, a metal in Group II in the periodic table, with an atomic number of 56 and an atomic mass of 137.33.

O₂ is the chemical symbol for Oxygen, a nonmetal, with an atomic number of 8 and an atomic mass of 16.00. Oxygen almost always exists as O₂ molecules in the air.

BaO is the chemical symbol for Barium Oxide, a white solid with a molecular mass of 153.33 g/mol.

Reaction conditions: This reaction occurs when barium is burned in the air or in pure oxygen at high temperatures.

Reaction process: When barium is burned in air or oxygen, it produces barium oxide. The balanced chemical equation for this reaction is 2Ba + O₂ -> 2BaO.

Phenomena observed: When barium is burned in air or oxygen, a blue-green flame appears. The product formed, barium oxide, is a white solid.