Which Group 13 soft metal melts near 303 K and is important in semiconductor and solid-state device technology?

Explanation

Gallium is a soft Group 13 metal that melts near 302.9 K, approximately 29.8 °C. Gallium compounds such as gallium arsenide and gallium nitride are important semiconductors used in electronic and light-emitting devices. Boron is a metalloid; aluminium and thallium melt at much higher temperatures.