History of Electrum. This gold-silver alloy has a long history of being used by humans. It was used for different purposes since third millennium BC. However, the variation in the gold and silver contents of this alloy made it difficult to decide the value of each coin.
Malleability is the ability of materials to deform easily under compressive stress. This can be often characterized as materials ability to form thin sheets by hammering or rolling. On the other hand, Ductility is the ability of materials to deform easily under tensile stress.
Metals are malleable (able to be hammered easily into thin sheets) and ductile (ability to draw it out into a wire) because the bonds are not very directional or strong.Explain why metals are malleable and ductile but ionic-crystalline compounds are not. î î î.etals are malleable (able to be hammered easily into thin sheets) and ductile (ability to draw it out into a wire) because the bonds are not very directional or strong.