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Based on the Mohs Hardness Scale, which mineral could be scratched by a penny but not by a fingernail?Question options:A) FluoriteB) TalcC) CalciteD) Gypsum

Based On The Mohs Hardness Scale Which Mineral Could Be Scratched By A Penny But Not By A FingernailQuestion OptionsA FluoriteB TalcC CalciteD Gypsum class=

Sagot :

Given:

Scale number of a penny = 3.5

Scale number of a fingernail = 2.5

Let's determine the mineral from the options which could be scratched by a penny but not a fingernail.

A mineral with a scale number can scratch any material with equal or lower scale number.

Since a penny has a scale number of 3.5, it can scratch any material with a scale number of 3.5 or lower.

Also, since a fingernail could not scratch the material here, this means the scale number if the material must be greater than 2.5.

Thus, the mineral that could be scratched by a penny but not a fingernail must have a scale number equal to or less than 3.5 but greater than 2.5.

Hence, from the MOHS Hardness Scale, the mineral with a scale number between 3.5 and 2.5 is the Calcite with a scale number of 3.

Therefore, the mineral which could be scratched by a penny but not a fingernail is Calcite.

• ANSWER:

C) Calcite.

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