# Problem: Consider the lattice energies of the following Group 2A compounds: BeH 2, 3205 kJ/mol; MgH2, 2791 kJ/mol; CaH2, 2410 kJ/mol; SrH2, 2250 kJ/mol; BaH2, 2121 kJ/mol.The lattice energy of ZnH2 is 2870 kJ/mol. Considering the trend in lattice enthalpies in the Group 2A compounds, predict which Group 2A element is most similar in ionic radius to the Zn2+ ion.

###### FREE Expert Solution
87% (398 ratings)
###### FREE Expert Solution

lattice energy of ZnH2 is 2870 kJ/mol

look for the Group 2A compound that has the closest lattice energy

87% (398 ratings) ###### Problem Details

Consider the lattice energies of the following Group 2A compounds: BeH 2, 3205 kJ/mol; MgH2, 2791 kJ/mol; CaH2, 2410 kJ/mol; SrH2, 2250 kJ/mol; BaH2, 2121 kJ/mol.

The lattice energy of ZnH2 is 2870 kJ/mol. Considering the trend in lattice enthalpies in the Group 2A compounds, predict which Group 2A element is most similar in ionic radius to the Zn2+ ion.

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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 Curtis' class at UNC.