The boiling point of magnesium oxide MgO at a pressure of 1 atm cannot be determined through a simple calculation, as it depends on experimental data. However, I can provide you with the known boiling point of MgO.The boiling point of magnesium oxide MgO at a pressure of 1 atm is approximately 3600 degrees Celsius 3600C . This value is based on experimental data and is not derived from a specific calculation.