Gallium (Lat. Gallium) is an exceptionally soft metal. Solid gallium can easily be cut with an ordinary steel knife. Its melting point of only 29.76 °C means the metal will start to melt if held in the hand for a while. Gallium also conducts electricity and heat and has a relatively high boiling point (2229 °C). Gallium is the 34th most abundant element in the Earth’s crust.
Gallium (chemical symbol Ga) is found in relatively small amounts in everyday life, but it is very important for electronics: according to USGS, about three quarters of gallium is used in integrated circuits – semiconductors for phones, computers and telecommunications equipment. The gallium alloy galinstan is used in some medical thermometers as a non-toxic alternative to mercury. Gallium isotopes are used in nuclear medicine, where they help diagnose and treat certain diseases more effectively. Gallium is used to make lasers and various optical devices because of its ability to generate light under specific conditions. Gallium nitride (GaN) and gallium arsenide (GaAs) are widely used in light-emitting diodes (LEDs), which are widely used in lighting technology. Gallium arsenide is also used in high-efficiency solar modules and in the space and special equipment industries.
Sources:
https://periodic-table.rsc.org/element/31/gallium
https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-gallium.pdf
https://www.britannica.com/science/gallium
https://en.wikipedia.org/wiki/Gallium