What is the only metal that is liquid at room temperature?

The only metal that is liquid at room temperature is mercury, a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and is the only metallic element that is a liquid at standard conditions for temperature and pressure. Mercury is a heavy, silvery-white, odorless, and toxic liquid metal that is slightly volatile.

Mercury has been used for thousands of years in various forms including medicine, cosmetics, and religious ceremonies. It is also commonly used in thermometers, barometers, and other scientific apparatus due to its high density and low freezing point. However, due to its toxic nature, mercury has been phased out of many consumer products and industries.

Mercury is the only stable elemental metal that is liquid at room temperature. It has a melting point of −38.8 °C (234.3 K, −37.9 °F). Three more stable elemental metals melt just above room temperature: caesium (Cs), which has a melting point of 28.5 °C (83.3 °F); gallium (Ga) (30 °C [86 °F]); and rubidium (Rb) (39 °C [102 °F]).

Mercury is a silvery-white liquid that is highly reflective. It is also a very good conductor of heat and electricity. Mercury is used in a variety of applications, including thermometers, barometers, and switches. It is also used in some dental fillings and in some batteries.

Mercury is a very toxic metal. It can be absorbed through the skin, lungs, and digestive system. Mercury poisoning can cause a variety of health problems, including neurological damage, kidney damage, and reproductive problems.

Gallium is a soft, silvery-white metal that is liquid at room temperature. It is a member of the group 13 elements in the periodic table, and is chemically similar to aluminum. Gallium is used in a variety of applications, including semiconductors, alloys, and lasers.

Rubidium is a soft, silvery-white metal that is liquid at room temperature. It is a member of the group 1 alkali metals in the periodic table, and is chemically similar to potassium. Rubidium is used in a variety of applications, including lasers, atomic clocks, and electronics.

Cesium is a soft, silvery-white metal that is liquid at room temperature. It is a member of the group 1 alkali metals in the periodic table, and is chemically similar to lithium. Cesium is used in a variety of applications, including lasers, atomic clocks, and electronics.