Chalk, also known as calcium carbonate, is composed of the elements calcium, carbon and oxygen and has the chemical sign CaCO3. Calcium carbonate is found in layers all over the world and is the main component of snail s... More » Science Chemistry Atoms & Molecules

Natural chalk is made up of prehistoric saltwater organisms high in calcium that formed rock-like sediment. There is no inventor. Chalk-based materials have been used in writing for centuries, with no known inventor. More »

Natural chalk is a common form of calcium carbonate. Unlike other, chemically similar minerals, chalk deposits are laid down by living organisms known as coccolithophores. These microscopic animals thrive in the warm, sh... More »

The properties of calcium carbonate, or CaCO3, includes one atom of calcium, one atom of carbon, and three atoms of oxygen. Calcium carbonate is found in rock structures throughout the world and is an effective antacid. ... More »

Marble is made of calcium carbonate, CaCO3, which is also what limestone is made from. The only difference between limestone and marble is the crystalline structure. Limestone crystals are much smaller than that of marbl... More »

Chalk, like limestone, is a form of calcium carbonate (CaCO3), which is a compound. A compound is formed whenever two or more elements are bonded chemically. More »

In chemistry, CO NO3 represents a compound of carbon monoxide and nitrogen that contains the elements carbon (C), oxygen (O) and nitrogen (N). An element contains only one type of atom, whereas a compound contains multip... More »