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The following are the first four electronic energy levels of
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Chapter 18 Solutions
Physical Chemistry
- What is the electron configuration of Al 3* ? O (Ne) 4s2 3p! O (Nc|4s? O (Ar) O (Nc] O (Nc) 25? 3p!arrow_forwardThe standard formation enthalpy of KCl is -571 kJmol-1. Plot the Born-Haber cycle and calculate the electron affinity of chlorine with the help of the data below. ΔH°a(K) = 89 kJmol-1 BE(Cl-Cl) = 244 kJmol-1 IE(K) = 425 kJmol-1ΔHL(KCl) = 719 kJmol-1arrow_forwardPlease send me the question in 20 minutes it's very urgent plz findarrow_forward
- i need the answer quicklyarrow_forwardCalculate the fraction of atom sites that are vacant for lead (Pb, Z = 82) at its melting temperature (327 degrees C). Assume that the energy for vacancy formation is 0.55 eV/atom. Calculate the fraction of vacant sites at room temperature (25 degrees C). What is the ratio of these two values?arrow_forwardPlease answer thisarrow_forward
- Photoelectron spectroscopy studies of silicon atoms excited by X-rays with wavelength 9.890 × 10-1º m show four peaks in which the electrons have speeds 2.097 × 107 m s-!, 2.093 x 107 m s-!, 2.014 × 107 m s', and 1.971 x 107 m s-1. (Recall that 1 J = 1 kg m² s-2.) (a) Calculate the ionization energy of the electrons in each peak. (b) Assign each peak to an orbital of the silicon atom.arrow_forwardArrange the following ions in order of increasing อ ionic radius Cesium ion, iodide ion, telluride ion, barium ion. Smallest Largest Cst | Ba²+ | Te ²- | I- Ва 24 с. Sarrow_forwardin ne taist ME He Pa Example 4. Why do the transition elements exhibit higher enthalpies of atomisation? ( DA Try percet HOarrow_forward
- The photoelectron spectra of elements X and Y are shown below. What is the most likely chemical formula of the compound made from these elements? X 42.7 2.90 390 34.0 4.65 0,59 100 10 1 lonization Energy (MJ/mol) Y 67.2 1.68 3.88 100 10 lonization Energy (MJ/mol) O XY2 O XY ) X3Y2 O XY3 Number of Electrons Number of Electronsarrow_forwardThe quantum numbers for the electron(s) in the valence shell of thallium (81TI) are: NOTE: the designation electron(s) with brackets around the s means that there might be only one: "electron" or there might be more than one: "electrons" O (6,1,-1,2) (6,1,0,½) (6,1,1,½) O (6,1,-1,12) O (6,0,0,±12) (6,1,-1,½) O (6,0,0,±½/2)arrow_forwardCarbon has electronic configuration 1s2 2s2 2p2 . How will you justify its tetravalency?arrow_forward
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