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.
malleability refers to metals which can be hammered into different shapes.   ductility refers to metals which can be drawn into wires.   Not all metals are malleable or â¦ ductile.Cast iron, for example, is quite hard but brittle. But metals that are malleable or ductile are so because of the way in which atoms are arranged.In a metal the atoms lie close together and, while they strongly attract one another, may be able to flow past each other whilst maintaining their proximity, and the metal's shape can be changed. Not all metals are malleable or â¦ ductile. Cast iron, for example, is quite hard but brittle. But metals that are malleable or ductile are so because of the way in which atoms are arranged.