General Knowledge - General Science - Discussion
Discussion Forum : General Science - Elements and Metals (Q.No. 12)
12.
The hardest substance available on earth is
Discussion:
79 comments Page 3 of 8.
Krishna kunal from D.G.I.S madhepura Bihar said:
10 years ago
Diamond is very hard material because of the largest number of carbons present in it. We have seen that coal is made up of carbons and both are formed from same process and coal is modified into diamond. So, we found that coal and diamond are found in same mine.
Prathibha patel said:
10 years ago
Diamond is the hardest natural material known, where hardness is defined as resistance to scratching and is graded between 1 (softest) and 10 (hardest) using the Mohs scale of mineral hardness. Diamond has a hardness of 10 (hardest) on this scale. Diamond's hardness has been known since antiquity, and is the source of its name.
Pooja sharma said:
1 decade ago
Because of tightly presence of carbon bonding between each atom of diamond and its opaque nature diamond is the hardest material than platinum.
Sasi Kumar said:
9 years ago
According to hardness scale, Diamond scaled 10 represents highest hard material, and soft material is talcum powder with hardness number 1.
Suvankar Chakraborty said:
7 years ago
I think it would be boron carbide.
Shaan said:
7 years ago
Presently the hardest substance is wurtzite boron nitride.
Arsh garg said:
7 years ago
It is the hardest mineral.
It is also used to cut glass.
It is a non-metallic mineral.
It is also used to cut glass.
It is a non-metallic mineral.
Saran said:
8 years ago
Diamonds have strong covalent bond.
Adams said:
8 years ago
Because it is the hardest subtance on earth.
Danamma K said:
8 years ago
Diamond is metal with this feature also it is made of carbon atoms. So here there is strong bond or covalent bond between carbon atoms (atoms are tightly fixed). So these two characteristics combine to make it strong and hard.
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