Calculate the Lattice Energy (Ionic Bond Energy) of each compound given:
▪ Group 1A → +1 charge → Na+
▪ Period = 6
▪ Group 7A → -1 charge → I-
▪ Period = 5
Which set of compounds is arranged in order of increasing magnitude of lattice energy?
a) CsI < NaCl < MgS
b) NaCl < CsI < MgS
c) MgS < NaCl < CsI
d) CsI < MgS < NaCl
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