Mohammad Modassir Mushtaque
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Posted 5 year ago
This non-metal exists in many forms- as a black, crumbly solid called graphite, as well as one of the hardest substances on Earth- diamond.
2 Answer(s)
Lalit Patel
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Nishu Sharma
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Posted 4 year ago Nishu Sharma

The non metal above mentioned is carbon which has atomic number 6 . Carbon has mny allotropes like graphite and diamond.