Trends in Melting Points, Boiling Points, and Atomization Energies of Group 2

• Melting points (purple bars): Aside from an irregularity at magnesium, the melting point of each element decreases down the group.
• Boiling points (cyan bars): There is no meaningful trend in boiling points for the Group 2 elements.
• Atomization energy (orange bars): The atomization energy is the energy needed to produce 1 mole of atoms in the gas phase from the element in its standard state (the expected state at approximately room temperature and pressure). As with boiling points, there is no simple pattern for atomization energies for the Group 2 elements. The chart looks similar, but not identical to, the boiling point chart.