Arvind Ashok kadam
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Posted 4 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)
V PRABHAKAR RAO
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Posted 4 year ago V PRABHAKAR RAO

it is carbon and it exists in many forms namely: graphite , diamond.

Nishu Sharma
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Posted 4 year ago Nishu Sharma

The element is carbon which exists in many forms like diamond, graphite etc.   The atomic number of carbon is 6.