Silver, a shiny, white precious metal, possesses a face-centered cubic crystal structure. It displays an extraordinarily broad range of positive physical characteristics, for example it is the best known reflector of visible light and has the highest thermal and electrical conductivity of all the metals. After gold, soft silver (HV 30) is the most ductile metal; it can be drawn into extremely fine wires and hammered into exceptionally thin sheets, or leaf. Further chemical properties: Silver is resistant to non-oxidizing acids such as hydrochloric acid at room temperature, but is slightly soluble in oxidizing acids (e.g., nitric acid), as well as heated, concentrated sulfuric acid or alkali cyanide solutions containing oxidizing agents. Silver is resistant to melting in alkali hydroxide. Silver usually bonds with an oxidation state of +1, but valences of +2, +3 und +4 are also possible. It also possesses antibacterial, fungicidal and antiseptic qualities.