Which of the following ionic compounds would have the most negative lattice energy: NaCl, KCl, or MgCl2? Explain your answer.

MgCl2

Explanation:

Lattice energy will be higher on ion with higher charge, or smaller size. A higher charge means it will have a stronger force. Smaller size ion will have less distance.  

Magnesium has +2 charge and located in the third row, make it strongest of these three. Natrium will be the second strongest even though its charge is +1, the same as Kalium. Natrium has smaller size as it is on the third row, compared to Kalium that was in the fourth row.

the answer is the first option

explanation:

just googled it m8. not that hard

lol

b.final