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Line 1: − Gallium is a silvery-white metal used in high-speed semiconductors and LEDs in the form of gallium arsenide (GaAs). The pure metal is somewhat brittle, has a very low melting point of 29.78° Celsius (85.2° Fahrenheit). It will melt in your hand if held long enough, but this is not recommended because it stains hands and is difficult to get off. − It is used in some thermometers in the form of an alloy of gallium, indium, and tin. The reason this alloy is used in thermometers is because it’s a liquid at room temperature and therefore can be used as an alternative to mercury, which is poisonous.
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