Exploring the Wonders of Gallium

Gallium is a soft, silvery blue metal with the chemical symbol GA and atomic number 31. Predicted by Mendeleev and discovered by Lecoq, gallium is used in semiconductors like gallium nitride and gallium arsenide, which are alternatives to silicon in electronics. These compounds are crucial in LEDs, laser diodes, and solar cells. Gallium also forms low melting alloys like Galinstan, used in thermometers, and is applied in creating reflective surfaces and mirrors.

Who predicted the existence of gallium before it was discovered?

• Isaac Newton

• Marie Curie

• Dimitri Mendeleev

• Albert Einstein

What is the primary use of gallium compounds in the electronics industry?

• Fiber optics

• Magnetic storage

• Semiconductor manufacturing

• Battery production

Which gallium compound is used in laser diodes to produce blue and green laser beams?

• Gallium phosphide

• Gallium oxide

• Gallium nitride

• Gallium fluoride

What is Galinstan primarily used for?

• As a coolant in nuclear reactors

• In medical thermometers

• In jewelry making

• As a lubricant

Why is liquid gallium used on glass surfaces?

• To increase durability

• To improve thermal conductivity

• To create a reflective surface

• To change the color