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 7 of 8.
Ram shankar said:
1 decade ago
It is because the carbon have sigma bond and arranged like branches and the atom's are 3 dimensional and other allotropes of carbon have smooth surface (ex. Graphite) which by pressing on a hard surface get's erased or eradicated, unlike Diamond.
Falgun said:
1 decade ago
Because it's molecules force of attraction is high.
Omaish Azmi said:
1 decade ago
Diamond is very lightly diamond is not stroke by hammer.
Ajay sihag said:
1 decade ago
There is no free lone pair or electron b/w carbon and carbon and has four covalent bonds but graphite is softest allotrope of carbon.
Abni said:
1 decade ago
I get to know that diamond is a the hardest known metal in earth. It can't be broken easily and is given shape by another diamond.
Is it not amazing? We can break other metal (say iron) with cutters and all but diamond with diamond only.
Is it not amazing? We can break other metal (say iron) with cutters and all but diamond with diamond only.
Ahmed El Bagoury said:
1 decade ago
The toughness of platinum is in the range 50 - 135 MPa.m1/2 which is much greater than that in diamond which is in range 7.5 - 10 MPa.m1/2. And this property shows that platinum needs more force to be broken.
Krishna said:
1 decade ago
Diamond is hardest because stronger covalent bonding present than gold.
Utkarsh tathe said:
1 decade ago
Diamonds cannot be broken by hammer.
Balashekar said:
1 decade ago
Because diamond is stronger than iron because a diamond can be cut other diamond only we can cut iron with the different cutters but for diamond it is not possible.
Swethy said:
1 decade ago
Is diamond stronger than iron?
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