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Chapter 41: Q. 3 (page 1206)
What is the difference between and ?
The difference between is proved below.
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An atom in an excited state has a % chance of emitting a photon in . What is the lifetime of the excited state?
a few energy levels of the mercury atom.
a. Make a table showing all the allowed transitions in the emission spectrum. For each transition, indicate the photon wavelength, in .
b. What minimum speed must an electron have to excite the wavelength blue emission line in the spectrum?
An atom in an excited state has a chance of emitting a photon in . How long will it take for of a sample of excited atoms to decay?
Does each of the configurations in FIGURE Qrepresent a possible electron configuration of an element? If so,
(i) identify the element and
(ii) determine whether this is the ground state or an excited state. If not, why not?
Predict the ground-state electron configurations of and ?
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