Department of Chemistry 
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition,
     structure, properties, behavior and the changes they undergo during a reaction with other substances.
Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. 
    There are four types of chemical bonds: covalent bonds, in which compounds share one or more electron(s);
     ionic bonds, in which a compound donates one or more electrons to another compound to produce ions (cations and anions); 
    hydrogen bonds; and Van der Waals force bonds.