Identify the main group to which X belongs in each of the following ionic compou

Question

Identify the main group to which X belongs in each of the following ionic compound formulas. For each of the following pairs, choose the compound with the lower lattice energy. Arrange the substances with polar covalent bonds in order of increasing bond polarity. What is the longest wavelength (in nm) that can dissociate a molecule of HI? If a photon of 212 nm is used, what is the excess energy (in J) over that needed for the dissociation? Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. J If all of this excess energy is carried away by the H atom as kinetic energy, what is its speed (in m/s)?

Explanation / Answer

1) X belongs to Group 17.

2) NaCl.

3) Cl > F radius. but elecronegativity F > Cl.

4) b)

5) K2O.

6) radius S> O. but electronegativiy O> S.

7) the increasing order is Br2 < P4 < NO2 < SO2 < BF3 <KCl.

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