EXAMPLES OF LIQUID

Only two elements are liquid at room temperature and pressure: mercury and bromine. Five more elements have melting points slightly above room temperature: francium, caesium, gallium, rubidium and iodine.^[1] Metal alloys that are liquid at room temperature include Liquidmetal, a zirconium metal alloy, and galinstan, a fusible alloy liquid.

Pure substances that are liquid under normal conditions include water, ethanol and many other organic solvents. Liquid water is of vital importance in chemistry and biology; it is believed to be a necessity for the existence of life.^{[citation needed]}
Important everyday liquids include aqueous solutions like household bleach, other mixtures of different substances such as mineral oil and gasoline, emulsions like vinaigrette or mayonnaise, suspensions like blood, and colloids like paint and milk.
Many gases can be liquefied by cooling, producing liquids such as liquid oxygen, liquid nitrogen, liquid hydrogen and liquid helium. Not all gases can be liquified at atmospheric pressure, for example carbon dioxide can only be liquified at pressures above 5.1 atm.

Some materials cannot be classified within the classical three states of matter; they possess solid-like and liquid-like properties. Examples include liquid crystals, used in LCD displays, and biological membranes.