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Very probable the hardness of protactinium was not measured up today because is very difficult to obtain a sufficient sample.
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∙ 9y ago
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How hard is boron?
Extremely hard about 9.5 on Mohs' scale
How hard is rutherfordium on the Mohs scale?
The hardness of rutherfordium is impossible to be measured today with only some atoms.
Why did friedrich mohs invent mohs hardness scale?
This scale is a chart of relative hardness of the various minerals
Is wulfenite hard enough to make into a gem?
No. Wulfenite has a hardness of 2.75-3.0 on the Mohs scale, so it is not hard enough to make a gem out of it.
Is coal on the Mohs scale of hardness?
No. The Mohs scale only lists minerals. Coal is a sedimentary or metamorphic rock, depending on the variety.
What is the hardness of diatomite on the mohs scale of hardness?
how hard is diatomite on mohs scale
How hard is quarts on the mohs scale?
Quartz has the value of 7 on the Mohs scale.
How hard is amber on mohs scale?
Amber is 2-3 on the mohs scale of hardness.
How hard is a finger nail on the mohs hardness scale?
It is about 2.5 in the Mohs Hardness Scale.
How hard is tourmaline on mohs scale?
Tourmaline has a hardness of 7-7.5 on the Mohs hardness scale.
How hard is calcite on Mohs scale?
4
How hard is safire?
9 on the mohs scale
How hard is boron?
Extremely hard about 9.5 on Mohs' scale
How hard is tanzanite?
On the Mohs scale, 6.5 to 7.0.
How hard is the tanzanite?
On the Mohs scale, 6.5 to 7.0.
How hard is calcite on te Mohs scale?
3
How hard is barium?
1.25 on the Mohs Scale
