Arrange each of the following in order of increasing energy: a. the changes of e

Question

Arrange each of the following in order of increasing energy: a. the changes of electron energy levels from 5 to 2, 4 to 2, and 3 to 2. (least energetic) __________ to ________, _______ to _______, _________ to ________ (most energetic) b. the wavelengths of spectral lines 650 nm, 480 nm, and 430 nm (least energetic) ______, _______, __________ (most energetic) Calculate the wavelength of the emission line when electrons transition from energy level 6 to 2 in a hydrogen atom. Is this emission line in the ultraviolet, visible, or infrared region of the spectrum? Advertising lights are often referred to as "neon lights." If advertising lights are simply large gas discharge tubes, do all "neon lights" contain neon gas? Explain.

Explanation / Answer

Q1.

the drop of energy is direclty related to

E = (1/nf^2 - 1/ni^2)

therefore

E (5 to 2)= (1/2^2 - 1/5^2) = 0.21

E (4 to 2)= (1/2^2 - 1/4^2) = 0.1875

E (3 to 2)= (1/2^2 - 1/3^2) = 0.138

clearly, the higher the drop, the more energy it will have

b)

Note that

we can relate energy and wavelenght via

E = hc/WL

where h is planck concstant and c speed of light, both are constant so

the larger value of WL, the lower value of E

so

most energetic must be

430 nm > 480 > 650 nm

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.