University:
Bradley University
Course:
CHM 420 | Instrumental Analysis
Academic year:

2023
Views:

182

Pages:

1
Author:

Olive Estrada

Formula weight (FW), in chemistry, the sum of the atomic weights of all atoms appearing in a given chemical formula. This term is generally applied to a substance that does not consist of individual molecules, such as the ionic compound sodium chloride. Ionic compounds are represented by a chemical formula that describes the simplest ratio of the number of atoms of the constituent elements. Therefore.The difference is not in numerical value but merely terminology. Example of an ionic compound: You are not able to distinguish an individual molecule of NaCl in a part of the crystal. Cl + Na The NaCl crystal is face centered cubic (fcc) unit cell with the counter ion filling the octahedral holes in the structure.