🤓 Based on our data, we think this question is relevant for Professor Dixon's class at UCF.

We are being asked to identify which compound has a higher magnitude lattice energy between NaCl and MgCl_{2}

$\overline{){\mathbf{Ionic}}{\mathbf{}}{\mathbf{Bond}}{\mathbf{}}{\mathbf{Energy}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{|\mathrm{cation}\mathrm{charge}\xb7\mathrm{anion}\mathrm{charge}|}{\mathbf{cationradius}\mathbf{}\mathbf{+}\mathbf{\hspace{0.17em}}\mathbf{anion}\mathbf{}\mathbf{radius}}}$

Radius = period number

• To determine the cation and anion charge, recall that some elements have common charges based on what **group** they belong to on the periodic table:

Group 1A +1 charge

Group 2A +2 charge

Group 3A +3 charge

Group 4A *typically do not gain or lose e ^{-} until Tin (Sn) and Lead (Pb)*

Group 5A -3 charge

Group 6A -2 charge

Group 7A -1 charge

• For their cation and anion radius, r*efer to the periodic table to determine which period the atom belongs to*

**Calculate the Lattice Energy (Ionic Bond Energy) of each compound given:**

**NaCl**

• Na

▪ Group 1A → +1 charge → Na^{+}

▪ Period = 3

• Cl

▪ Group 7A → -1 charge → Cl^{-}

▪ Period = 3

$\mathbf{Ionic}\mathbf{}\mathbf{Bond}\mathbf{}\mathbf{Energy}\mathbf{}\mathbf{=}\mathbf{}\frac{|\mathrm{cation}\mathrm{charge}\xb7\mathrm{anion}\mathrm{charge}|}{\mathbf{cationradius}\mathbf{}\mathbf{+}\mathbf{\hspace{0.17em}}\mathbf{a}\mathbf{nion}\mathbf{}\mathbf{radius}}\phantom{\rule{0ex}{0ex}}\mathbf{Ionic}\mathbf{}\mathbf{Bond}\mathbf{}\mathbf{Energy}\mathbf{}\mathbf{=}\mathbf{}\frac{|\left(+1\right)\xb7\left(-1\right)|}{\mathbf{3}\mathbf{}\mathbf{+}\mathbf{\hspace{0.17em}}\mathbf{3}}\phantom{\rule{0ex}{0ex}}\mathbf{Ionic}\mathbf{}\mathbf{Bond}\mathbf{}\mathbf{Energy}\mathbf{}\mathbf{=}\mathbf{}\frac{1}{\mathbf{6}}$

**Ionic Bond Energy = 0.17 **

Which compound has a higher magnitude lattice energy: NaCl or MgCl_{2}?

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Our tutors have indicated that to solve this problem you will need to apply the Lattice Energy concept. You can view video lessons to learn Lattice Energy. Or if you need more Lattice Energy practice, you can also practice Lattice Energy practice problems.

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Based on our data, we think this problem is relevant for Professor Dixon's class at UCF.