Mercury. It isn't used much these days in thermometers these days as it is very toxic.
Mercury is a liquid metal used in thermometers. However, it becomes a solid at -37.9 F and it can cause mercury poisoning if ingested or inhaled. Therefore, most theremometers use ethyl-alcohol or a plastic strip covered with liquid crystals (called a liquid crystal thermometer).
Mercury!
Mercury
Mercury is the transition metal that is liquid at room temperature and is sometimes used in outdoor security lights due to its properties of being a good conductor of electricity and emitting light when ionized. However, due to its toxicity, mercury is being phased out in favor of more environmentally friendly alternatives.
mercury
Mercury (Hg)
Mercury.
Mercury is the element commonly used in liquid-in-glass thermometers.
Mercury is the only metal that is liquid at room temperature. It is used in thermometers, barometers, and some electrical switches and relays.
mercury
Mercury