(Solved): Can someone solve those questions with all details and explanation include. 1. Electrons play ...
Can someone solve those questions with all details and explanation include.
1. Electrons play an important role in interatomic bonding. Explain the role of electrons in each of the three primary bonding types. 2. \( \mathrm{CsBr} \) has a crystal structure where each Br- Ion (blue) is surrounded by \( 8 \mathrm{Cs}+ \) ions (green). Derive the minimum \( \mathrm{r} / \mathrm{R} \) (or \( \mathrm{r} \mathrm{C} / \mathrm{r}_{\mathrm{A}} \) ) ratio required for stability for the general case of \( \mathrm{CN}=8 \). Hint: use the scenario where the 8 corner atoms are touching and the central atom just fits into the center space. 3. The interaction energy between two ions can be described as: \( E_{n e t}=\frac{-A}{r}+\frac{B}{r^{n}} \), where \( r \) is the interatomic separation and \( \mathrm{A}, \mathrm{B} \), and \( \mathrm{n} \) are constants. Solve for the equilibrium separation " \( r_{o} " \), in terms of \( \mathrm{A}, \mathrm{B} \), and \( \mathrm{n} \).
4. Consider divalent ionic bonding in KF. a) The radii are: \( (165,119) \) pm for \( (\mathrm{K}, \mathrm{F}) \); What coordination number would you expect? b) The electronegativities are \( (0.8,4.0) \) for \( (\mathrm{K}, \mathrm{F}) \); find the \% ionic character. \[ \% I C=\left(1-e^{\frac{-\left(x_{A}-x_{B}\right)^{2}}{4}}\right) \times 100 \]