Which of the following materials has the highest hardness Di

Which of the following materials has the highest hardness? Diamond Brass Nitrided Steel Plastic

Solution

Diamond has the highest hardness compared to brass, nitrided, steel and plastic

Because the Electrons in the Carbon atoms in a diamond are Tetrahedron fully and perfectly bonded together via the Covalent bond, which happens to be the strongest Chemical bond in nature.

There are other materials like Wurtzide boron nitride, which would withstand 18 per cent more stress than diamond, and lonsdaleite, 58 per cent more.