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Chapter 9: Q60P (page 375)

Using the periodic table only, arrange the elements in each set in order of decreasing EN: (a) Br, Cl, P; (b) I, F, O

Short Answer

Expert verified

Electronegativity is defined as an atom's proclivity to attract the shared pair of electrons between the bonded atoms.

Step by step solution

01

Electronegativity between Br, Cl, P

Br and Cl are in the same group in the given elements, and P and Cl are in the same period. Because EN rises in periods and falls in groups, the decreasing order of EN for the given elements is -

Cl > Br > P

02

Increasing order of Electronegativity between I, F, O

I and F are in the same group in the given elements, and F and O are in the same period. Because EN rises in periods and falls in groups, the decreasing order of EN for the given elements is -

F>O>I

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Most popular questions from this chapter

What would be the formula for the simplest compound formed from (a) phosphorus and chlorine, (b) carbon and fluorine, and (c) iodine and chlorine?

How is the partial ionic character of a bond in a diatomic molecule related to ΔEN for the bonded atoms? Why?

Lattice energies can also be calculated for covalent solids using a Born-Haber cycle, and the network solid silicon dioxide has one of the highest ΔHoLatticevalues. Silicon oxide is found in pure crystalline form as transparent rock quartz. Much harder than glass, this material was one prized for making lenses for optical devices and expensive spectacles. Use appendix B and the following data to calculateΔHoLattice of SiO2 :

Si(s)→Si(g)                  ΔHo=454kJSi(g)→Si4+(g)+4e-       ΔHo=9949kJO2(g)→2O(g)                ΔHo=498kJO(g)+2e-→O2-(g)     ​​​   ΔHo=737kJ

Linear, triatomic CO2vibrates by symmetric stretch, bend, and asymmetric stretch with frequencies of 4.02×1013s-1, 2.00×1013s-1and 7.05×1013s-1 respectively.

  1. In what region of the electromagnetic spectrum are these frequencies?
  2. calculate the energy (in J) of each vibration. Which takes the least energy?

carbon- carbon bonds form the “backbone” of nearly every organic and biological molecule. The average bond energy of the C-C bond is 347kJ/mol. Calculate the frequency and wavelength of the least energetic photon that can break an average C-C bond. In what region of the electromagnetic spectrum is this radiation?
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