Metals 

^^Metals^^ - Elements that are good conductors of electric current and heat

🔑The physical properties of metals include luster, malleability, ductility and conductivity

^^luster^^ - a material that has a high luster is shiny and reflective

^^malleable^^ - material that can be hammered or rolled into flat sheets or other shapes

^^ductile^^- material that can be pulled out or drawn into long wires

^^Thermal conductivity^^- the ability of an object to transfer heat

^^electrical conductivity^^- ability to carry an electric current

^^reactivity^^- the ease and speed at which an element combines or reacts with other substances (chemical property)

^^corrosion^^- the deterioration of a metal due to a chemical reaction in the environment

🔑 in the periodic table, metals are classified as alkali metals, alkaline metals,, transition metals, metals in mixed groups, lanthanides, and actinides

^^alkali metals^^ - the metals in group 1, most reactive

^^alkaline earth metals^^ - group 2, harder, denser, melt at higher temperatures than the alkali metals

^^transition metals^^- groups 3-12, mostly hard and shiny solids, except for mercury, these metals often have high melting points and high density

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