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www.reference.com/science/chemical-composition-chalk-77236e4f4cdea582

Chalk is calcium carbonate and has the same chemical composition as limestone, marble, ground calcium carbonate and precipitated calcium carbonate. Chalk, like the other types of calcium carbonate, is in the form of calcite, which is a crystal. Chalk derives from shells of coccoliths or algae.

en.wikipedia.org/wiki/Chalk

The chemical composition of chalk is calcium carbonate, with minor amounts of silt and clay. It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into chalk rock. Uses.

projects.ncsu.edu/project/hubbepaperchem/CHLK.htm

CHALK. Composition: Chalk is a form of calcium carbonate, having the same chemical composition as ground calcium carbonate, limestone, marble, and precipitated calcium carbonate (PCC). In fact, all of the calcium carbonates listed in the previous sentence have the same crystal form, calcite. What makes chalk different is its origin as the ...

www.britannica.com/science/chalk

Chalk: Chalk, soft, fine-grained, easily pulverized, white-to-grayish variety of limestone. Chalk is composed of the shells of such minute marine organisms as foraminifera, coccoliths, and rhabdoliths. The purest varieties contain up to 99 percent calcium carbonate in the form of the mineral calcite. The

www.quora.com/What-is-the-chemical-formula-of-chalk

2 answers say that chalk is CaCO3. True. If you heat CaCO3 you get CaO and CO2. The chalk probably gets powdery looking. If you are in a classroom, and heat a stick of chalk used for writing on a blackboard, you'll find it contains other stuff as well, probably some kind of glue to hold the chalk together.

www.answers.com/Q/What_is_the_chemical_composition_of_chalk

The chemical composition of dustless chalk is calcium sulphate treated with a binder like starch or gum. The particles calcium sulphate are made to be very fine in dustless chalk.

answers.yahoo.com/question/index?qid=20080117010703AA1h4uI

This Site Might Help You. RE: What is the Chemical composition of Dustless Chalk ? What are the Chemicals used in making the Dustless Chalk ? It will be better if anyone can inform the composition in Simple English, instead of Chemistry formula.

geologyscience.com/rocks/sedimantery-rocks/chalk

Chalk Chemical Composition. Chemical composition of chalk is calcium carbonate and with minor about silt and clay minerals. It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into rock.

www.chemistryislife.com/the-chemistry-of-climbing-chalk

Chemistry's Role Climbing chalk comes from magnesite which is MgCO 3 mixed with iron (II) and carbonate crystals. Magnesite is heated to get rid of the iron and carbonate, but the heat doesn’t break the bond between the magnesium and the carbonate because it is an ionic bond.

pubchem.ncbi.nlm.nih.gov/compound/calcium_carbonate

Calcium;carbonate | CCaO3 | CID 516889 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...