Out of NaCl and MgO which has higher lattice energy ?

Answer

To determine which compound, NaCl or MgO, has higher lattice energy, we can follow these steps:

### Step 1: Understand Lattice Energy
Lattice energy is the energy released when gaseous ions combine to form an ionic solid. It is influenced by the charges of the ions and the distance between them.

### Step 2: Analyze the Charges of the Ions
- In NaCl, sodium (Na) has a charge of +1 and chloride (Cl) has a charge of -1.
- In MgO, magnesium (Mg) has a charge of +2 and oxide (O) has a charge of -2.

### Step 3: Compare the Charges
The charges on the ions in MgO are greater than those in NaCl:
- NaCl: +1 and -1
- MgO: +2 and -2

### Step 4: Apply the Concept of Lattice Energy
Lattice energy is directly proportional to the product of the charges of the ions:
- Higher charges lead to stronger ionic bonds, which means higher lattice energy.

### Step 5: Conclusion
Since MgO has ions with higher charges compared to NaCl, it will have a higher lattice energy.

### Final Answer
MgO has a higher lattice energy than NaCl.

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