sentence: Alloys are mixtures, where at least one part of the mixture is a metal.
sentences_before: Most metals are solid at room temperature, but this does not have to be the case. Mercury is liquid.
sentences_after: Examples of metals are  aluminium, copper, iron, tin, gold, lead, silver, titanium, uranium, and zinc. Well-known alloys include bronze and steel.
concept_name: alloy
headings: Metal