AP BIOLOGY

Detailed explanation-1: -A covalent bond forms when electrons are shared between atoms. The structure that results when atoms are joined together by covalent bonds is called a molecule. When molecules are close together, a slight attraction can develop between the oppositely charged regions of nearby molecules.

Detailed explanation-2: -What are Van der Waals Forces? Van der Waals forces are weak intermolecular forces that are dependent on the distance between atoms or molecules. These forces arise from the interactions between uncharged atoms/molecules.

Detailed explanation-3: -ˈvan-dər-ˌwȯlz-ˈvän-dər-ˌvälz-: the relatively weak attractive forces that act on neutral atoms and molecules and that arise because of the electric polarization induced in each of the particles by the presence of other particles.

Detailed explanation-4: -van der Waals forces: dispersion forces Dispersion forces (one of the two types of van der Waals force we are dealing with on this page) are also known as “London forces” (named after Fritz London who first suggested how they might arise).

Detailed explanation-5: -Hydrogen bond-A weak chemical bond formed when a positively charged region of one molecule (caused by a polar covalent bond) is attracted to a negatively charged region of another molecule. Hydrogen bonds may also be formed by oppositely charged regions of a single large molecule.