The chemical composition of sand is primarily SiO2, or silica. Silica, which is also named as quartz, is a type of mineral that makes up most of the sand types like beach sand. More »

The chemical formula of feldspar is KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8. Feldspar is the name of a mineral group that contains silica and alumina in their composition. This group contains a wide variety of minerals, includ... More »

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 calc... More »

The chemical composition of table salt is one atom of sodium (Na) to one atom of chlorine (Cl), known as sodium chloride (NaCl). Table salt also often has iodine added in for health reasons, but this does not change the ... More » Science Chemistry Atoms & Molecules

The difference between a chemical change and a physical change lies in how the change affects the composition a substance. A chemical change occurs on the molecular level and produces a new substance. However, a physical... More »

While physical change is the rearranging of molecules in a substance, a chemical change affects the intrinsic properties of a substance, altering its chemical composition. More »

The chemical composition of table salt is NaCl. Table salt is a combination of sodium and chlorine, which form ionic bonds. More »