Question

An unknown mineral possesses a black streak and a density of 18g/cm3. Do you think it is metallic or non metallic?

Answer 1

Answer:

Because the mineral is opaque, it is more likely to be metallic, and metallic minerals are generally hefty and have black streaks. 5.

I am not aware of any nonmetallic material with a specific gravity of 18. It needs to be built of metal. Platinum has a gleaming silver stripe and may be thick. Metals have a higher density, hence it's more likely to be metallic.

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