Which alkaline-earth metal has the lowest melting point?

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A color-coded periodic table of the elements displays each element's symbol and atomic number, with categories such as alkali metals, noble gases, halogens, transition metals, and actinoid elements distinguished by different background colors. — alkaline-earth metal Modern version of the periodic table of the elements (printable).

Among the alkaline-earth metals, magnesium has the lowest melting point, at 650 °C (1,202 °F).1

The melting points of the alkaline-earth metals vary in an irregular fashion across the group, with beryllium having the highest melting point at 1,287 °C (2,349 °F).1