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There are a couple of things that make chalk hard. The calcium in chalk is said to make chalk hard.
Wiki User
∙ 9y ago
Wiki User
∙ 8y agoOn the Mohs Scale chalk has a hardness of 1
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What is the hardness of promethium on the mohs scale?
Mercury's hardness is listed as '0' on interpretations of the Mohs scale.
What is the hardness of calcite on the MOHS hardness scale?
No one seems to know how hard scandium is on the mohs hardness scale (believe me i looked everywhere and they all say N/A) but i did manage to find it's hardness on the Brinell hardness scale. On the Brinell hardness scale it is 750 MPa. If you find how hard it is on the mohs scale please revise my awnser to also include that.
Which rock is the hardest granite or chalk?
Chalk is a sedimentary rock composed primarily of Calcium Carbonate. Calcium carbonate is also the number one mineral at the Marble spec. Hardness of Chalk is around 3 Mohs. Granite stay at the number 7 at the Mohs scale and Granite is harder than Marble. Granite is mostly composed by feldspat (christal).
Is chalk harder than rubber?
rubber is harder than chalk !
What stone is whitish grey with nonmetallic luster that leaves a colorless streak?
Chalcedony and corundum can both appear in white forms and have a Mohs hardness greater than most feldspars.
Explain why blackboards are not scratched by chalk but are scratched by the sand embedded in the chalk?
The hardness of sand is higher.
Is bedrock hard?
Bedrock could vary in hardness from chalk to granite.
Explain Why blackboards are not scratched by chalk but by the sand embedded in the chalk?
Blackboards are not scratched by chalk because chalk is softer than the material from which the blackboard is constructed. Sand scratches blackboards because it is harder than the material from which a blackboard is made.
What is the hardness of promethium on the mohs scale?
Mercury's hardness is listed as '0' on interpretations of the Mohs scale.
What is the hardness of calcite on the MOHS hardness scale?
No one seems to know how hard scandium is on the mohs hardness scale (believe me i looked everywhere and they all say N/A) but i did manage to find it's hardness on the Brinell hardness scale. On the Brinell hardness scale it is 750 MPa. If you find how hard it is on the mohs scale please revise my awnser to also include that.
What is a non example of hardness?
diamonds are hard because they cannot be scratched.
Which rock is the hardest granite or chalk?
Chalk is a sedimentary rock composed primarily of Calcium Carbonate. Calcium carbonate is also the number one mineral at the Marble spec. Hardness of Chalk is around 3 Mohs. Granite stay at the number 7 at the Mohs scale and Granite is harder than Marble. Granite is mostly composed by feldspat (christal).
Can a fingernail scratch some minerals?
Yes. But only soft ones such as talc (solid form of chalk and baby powder). Generally only minerals below 2 on the hardness scale.
What is the rock that makes up white cliffs of dover?
chalk
What is the physical appearance of chalk?
Since limestone is predominantly composed of calcium carbonate (CaCO3), it is soluble in acid (or when crushed soluble in water) and is an alkali. Also it makes good lime for the garden, when heated properly it makes good portland for concrete, and is used in toothpaste and antacids. For information on the material properties of limestone, such as strength, stiffness and density, please see the related questions.
What is a word that goes before chalk?
colored chalk sidewalk chalk dustless chalk
Is chalk harder than rubber?
rubber is harder than chalk !
