Tuesday, May 24, 2016

How Hard are Metals?

Each metal has a different hardness.  
Gold
Copper
Any metal that can be rolled or pounded into flat sheets is said to be malleable.  Any metal that can be drawn out into strands of wire is said to be ductile.  Copper and god are in the group with the most malleable and ductile metals.

Not all metals are hard.  Sodium metal can be cut with a butter knife.


The hardness of metals is measured by denting them.  The size of the dent indicates the hardness.  Chromium is the hardest metal in pure elemental form.  Cesium is the softest metal.

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