Use the References to access important values if needed for this quest The follo

Question

Use the References to access important values if needed for this quest The following is a diagram of energy states and transitions in the hydrogen atom - infinity n3 ENERGY Match each of the responses below with the correct arrow from the figure. a) The emission line with the shortest wavelength b) The absorption line with the shortest wavelength c)The emission line with the lowest energy d)The absorption line with the lowest energy e) The emission line with the lowest frequency The line corresponding to the ionization energy of hydrogen. Submit Amswer Retry Entire Group 8 more proup attempts remaining

Explanation / Answer

Ans. Note the following points-

            I. Emission, i.e. emission of a photon, takes place an electron falls from higher to lower energy level.

II. Absorption, i.e. absorption of a photon, takes place an electron is excited from a lower to higher energy level.

III. Greater is the difference between energy levels of transitions, greater would be the absorption or emission for that transition.

IV. Shorter is wavelength, greater is its energy. So, greater is the absorption or emission, smaller would be the wavelength of absorbed or emitted photon, respectively.

V. Shorter is the wavelength, longer is its frequency.

VI. Energy of photon (E = h v) is proportional to its frequency, i.e. greater is the frequency, greater would be its energy.

#a. 4. (n4 to n1 transition). Emission because electron falls from higher to lower energy level.

            Shortest wavelength because this emission would emit photons of maximum energy (see, #IV).

#b. 3 (see, #II, IV)

#c. 5 (See, #1, III)

#d. 1. See (#II, III)

#e. 5 This emission has lowest energy (See, #III). Lower is the energy of emission, lower would be the frequency of the emitted photon.

#f. 3. The 1s electron escapes the atom. Thus, transition line 3 denotes ionization of an H-atom. So, the corresponding energy is equal to ionization energy of the atom.

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