When a Molecule Absorbs a Photon,the Molecule Is Promoted to an Excited

question 18

Multiple Choice

When a molecule absorbs a photon,the molecule is promoted to an excited state,M^*.The rate at which M^* is created is proportional to the concentration of M.There are three pathways that M^* may take to return to the ground state.Which statement below is INCORRECT for these three pathways.

• A)The rate at which the excited state returns to the ground state is independent of the pathway to the ground state and the concentration of excited state molecules.
• B)The three possible pathways to return to the ground state are emission,deactivation,and quenching.
• C)Quenching occurs when a second molecule,the quencher Q,collides with M^* to return M^* to the ground state.M^* + Q → M + Q^*
• D)Deactivation returns M^* to the ground state by colliding with other molecules and releasing energy in the form of heat.M^* → M + heat
• E)Emission returns M^* to the ground state by emitting a photon.M^* → M + hv.

---

Definitions:

Emotional Intelligence

The ability to understand and manage one's own emotions, and to recognize and influence the emotions of others.

Social Identity Approach

A theoretical framework that explores how individuals perceive themselves and others within social contexts, focusing on the impact of group membership on behavior and attitudes.

Prototypical Group Member

An individual who embodies the most characteristic attributes or qualities of a certain group, often serving as a standard or model for the group.

Task Oriented

A task-oriented approach focuses on completing tasks and achieving goals efficiently, with primary attention on job performance and tasks at hand.