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(a)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of K lines for Ca (3.064).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
(b)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of La lines for As (9.370).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
(c)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of Lß lines for U (0.592).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
(d)
Interpretation:
The minimum tube voltage needs to be calculated for the excitation of Lß lines for U (0.496).
Concept introduction:
Calculation of minimum tube voltage for the excitation of k lines for Ca is done by using the following formula-
Where,
λo = wavelength
Vmin = minimum tube voltage
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Chapter 12 Solutions
Principles of Instrumental Analysis
- The fundamental series of the emission spectrum of sodium shows transitions at the vacuum wavelengths (nm) 1846.4, 1268.27, 1083.75, and 996.38. Assuming the quantum defects for the nf levels are zero, and using the 3s --> 3d separation of 29,172.9 cm¹ (ignore the spin-orbit splitting of the 3d level), estimate the ionization energy of sodium (RN109,735 cm'¹).arrow_forward2. Predict the energy of the 2p electrons in K. [k = 13.6 ev and Szp = 2.579 + 0.333(2p - 1) – 0.0773(3s) - 0.0161(3p + 4s) - 0.0048(3d) + 0.0085(4p)]arrow_forwardA solution containing 1.00mg iron (as the thiocyanate complex) in 100mL was observed to transmit 70.0% ofthe incident light compared to an appropriate blank. (a) What is the absorbance of the solution at thiswavelength? (b) What fraction of light would be transmitted by a solution of iron four times as concentrated?arrow_forward
- Atomic spectroscopy is a type of spectroscopic technique that is used for both quantitative and qualitative analysis of an element present in a sample. The atomic absorption lines are very narrow and the line emitted by the radiation source must be the same as the element to be analyzed. (i) (ii) Name two types of line sources that are commonly used in atomic absorption spectroscopy. Suggest two elements that can be determined by each type of the line sources as mentioned in part (a)(i) above.arrow_forward(d) Where electrons are more likely to be found justify your answers with specific reason [1] b x→ ....arrow_forwardB6arrow_forward
- 18.1 An electron in the ground-state He* ion undergoes a transition to a state specified by the quantum numbers n= 4, 1=1, m,=+1. (a) Describe the transition using term symbols. (b) Calculate the wavelength, frequency, and wavenumber of the transition. (c) By how much does the mean radius of the electron change due to the transition? You need to know that the mean radius of a hydrogenic orbital is n’a 1+회 I(1+1) 1-arrow_forwardPlease explain answer clearlyarrow_forwardHow do you convert 435.835 λ(nm) to v (s-1)arrow_forward
- (a) The surface of a metal is illuminated with light of wavelength 590nm. A PD of 0.15V is applied between the metal surface and the collecting electrodes in order to prevent the collection of electrons. Calculate:(i) The work function of the metal.(ii.) The work done against the most energetic photoelectrons.(iii.) The speed of the most energetic electrons. (b.) Light of varying frequencies is incident on the surface of three different metals x, y and z. The work functions wo of the metals are such that w0x < w0y < w0z. Sketch on the same axes graphs to show how the maximum kinetic energies of photoelectrons vary with frequency.arrow_forwardA series of lines in the spectrum of atomic hydrogen lies at 656.46, 486.27, 434.17, and 410.29 nm. (a) What is the wavelength of the next line in the series? (b) What is the ionization energy of the atom when it is in the lower state of the transitions?arrow_forward11 a) Why is the energy of the 3P term in the Na atom higher than that of the 3S term? (b) Write down the schrodinger equation for H2*moleculular ion and explain the meaning of each term.arrow_forward
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