#31 Gallium

Gallium is a soft, silvery metal used primarily in electronic circuits, semiconductors and light-emitting diodes (LEDs). It is also useful in high-temperature thermometers, barometers, pharmaceuticals and nuclear medicine tests. The element has no known biological value.

Atomic mass:69.723 amu

Melting point:29.78 C (302.93 K, 85.604004 F)

Boiling point:2403.0 C (2676.15 K, 4357.4 F)

Density:293 K: 5.907 g/cm3