The document discusses the periodic table and electron configuration. It provides information on the periodic table and how electron configuration is used to describe the arrangement of electrons in an atom or ion. The document was prepared by Md Jahidul Islam of the Department of Pharmacy at Jashore University of Science & Technology.

1. Periodic table and
electron configuration

5. Prepared by
Md Jahidul islam
Department of pharmacy
Jashore university of science &
Technology