Why is diamond so hard chemistry?
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.
What property can be scratched by a diamond?
Mohs Hardness Scale
Diamond is the hardest mineral; no other mineral can scratch a diamond. Quartz is a 7. It can be scratched by topaz, corundum, and diamond.
Why do diamonds and graphite have different properties?
Explanation: Diamonds and graphite are both allotropes of Carbon. Allotropes are compounds of the same composition, but exists in two or more different forms due to the different bonding. … It’s because the carbon atoms are rearranged in a specific geometric shape that gives the diamond its properties.
Why is diamond not soluble in water?
Diamond is insoluble in water. … Every atom in a diamond is bonded to its neighbours by four strong covalent bonds, leaving no free electrons and no ions .
Why is diamond a substance?
Each carbon atom in a diamond is surrounded by four other carbon atoms and connected to them by strong covalent bonds – the strongest type of chemical bond. This simple, uniform, tightly-bonded arrangement yields one of the most durable and versatile substances known. Diamond is the hardest known natural substance.
Can a knife scratch a diamond?
Soft – can be scratched by a fingernail, Mohs’ 1-2; Medium – can be scratched by a knife or nail, Mohs’ 3-5; Hard – cannot be scratched by a knife but can scratch glass, Mohs’ 6-9; Diamond is the hardest known mineral, Mohs’ 10.
Why diamond is bad conductor?
In a graphite molecule, one valence electron of each carbon atom remains free, Thus making graphite a good conductor of electricity. Whereas in diamond, they have no free mobile electron. Hence there won’t be flow of electrons That is the reason behind diamond are bad conductor electricity.
Can diamonds be artificially prepared?
But stones with the same chemical properties as diamonds can now be made in laboratories. There are two methods of growing synthetic diamonds, and the process can be completed in as little as two weeks. … Scientists have been synthesizing diamonds for decades, producing the first gem-quality stones in the 1950s.
How are coal and diamond different from each other?
Coal is an impure carbon, it has impurities like oxygen, nitrogen, sulphur etc. Diamond requires a very pure form of carbon. Diamonds are formed much lower on Earth than the levels at which coal is formed. …
Are diamonds and graphite different minerals explain?
Graphite and diamond are two of the most interesting minerals. They are identical chemically – both are composed of carbon (C), but physically, they are very different. Minerals which have the same chemistry but different crystal structures are called polymorphs.