The outermost shell of each carbon atom has four electrons. In diamond, these electrons are shared with four other carbon atoms to form very strong chemical bonds resulting in an extremely rigid tetrahedral crystal. It is this simple, tightly-bonded arrangement that makes diamond one of the hardest substances on Earth.
Why diamond is the hardest known substance class 10?
Each carbon atom in a diamond is covalently bonded to four other carbons forming a tetrahedral structure. These tetrahedrons together form a 3-dimensional network of carbon rings. This stable network of covalent bonds and hexagonal rings makes diamond the hardest allotrope of carbon and also the hardest mineral.
Is diamond really the hardest?
While diamonds are classically viewed as the hardest material found on Earth, they are neither the strongest material overall nor even the strongest naturally occurring material. … Diamonds are still one of the hardest naturally occurring and abundant materials on Earth, but these six materials all have it beat.
Why is diamond very hard short answer?
In diamond, the outer shell of each carbon atom has 4 electrons and again these electrons are shared with 4 other carbon atoms by covalent bonds. This structure helps to form a rigid tetrahedral crystal. This tightly-bonded arrangement makes diamond one of the hardest substances on Earth.
What’s harder than diamond?
Moissanite, a naturally occurring silicon-carbide, is almost as hard as diamond. It is a rare mineral, discovered by the French chemist Henri Moissan in 1893 while examining rock samples from a meteor crater located in Canyon Diablo, Arizona. Hexagonal boron-nitride is 18% harder than diamond.
Which is the hardest allotrope of carbon answer?
Diamond is the hardest natural known substance which is an allotrope of carbon.
Is carbon the hardest allotrope?
Diamond is the hardest allotrope of carbon.