The Figure Shows the Energy Levels for an Electron in a Finite

question 21

Multiple Choice

The figure shows the energy levels for an electron in a finite potential energy well. If an electron in the n = 2 state absorbs a photon of wavelength 2.0 nm, what happens to the electron?

• A) It makes a transition to the n = 3 state.
• B) It makes a transition to the n = 4 state.
• C) It escapes the well with a kinetic energy of 280 eV.
• D) It escapes the well with a kinetic energy of 730 eV.
• E) Nothing; this photon does not have an energy corresponding to an allowed transition so it is not absorbed.

---

Definitions:

Developing Digestive Tract

The Developing Digestive Tract refers to the formation and maturation of the gastrointestinal system in embryos and fetuses, crucial for nutrient absorption and waste elimination post-birth.

Extraembryonic Membrane

Membranes outside the embryo, such as the amnion, chorion, yolk sac, and allantois, that provide protection and nourishment in vertebrate embryos.

Outermost Membrane

The most external membrane that encloses a cell or organelle, serving as a protective barrier and mediating interactions with the external environment.

Extraembryonic Membrane

A set of tissues formed by embryos of amniotes (reptiles, birds, and mammals) that provide support and protection but do not form part of the body of the embryo itself.