Chapter 7: Problem 75
Define the following terms and give an example of each: transition metals, lanthanides, actinides.
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Chapter 7: Problem 75
Define the following terms and give an example of each: transition metals, lanthanides, actinides.
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Photodissociation of water $$ \mathrm{H}_{2} \mathrm{O}(l)+h \nu \longrightarrow \mathrm{H}_{2}(g)+\frac{1}{2} \mathrm{O}_{2}(g) $$ has been suggested as a source of hydrogen. The \(\Delta H_{\mathrm{rxn}}^{\circ}\) for the reaction, calculated from thermochemical data, is \(285.8 \mathrm{~kJ}\) per mole of water decomposed. Calculate the maximum wavelength (in \(\mathrm{nm}\) ) that would provide the necessary energy. In principle, is it feasible to use sunlight as a source of energy for this process?
Explain what is meant by a noble gas core. Write the electron configuration of a xenon core.
Is it possible for a fluorescent material to emit radiation in the ultraviolet region after absorbing visible light? Explain your answer.
Which of the four quantum numbers \(\left(n, \ell, m_{\ell}, m_{s}\right)\) determine (a) the energy of an electron in a hydrogen atom and in a many- electron atom, (b) the size of an orbital, (c) the shape of an orbital, (d) the orientation of an orbital in space?
The electron configuration of a neutral atom is \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} .\) Write a complete set of quantum numbers for each of the electrons. Name the element.
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