MgO exists in a rock salt type unit cell. Each Mg ion will be in contact with — Solid State Chemistry Question

💡 Solution & Explanation

In a rock salt structure (like MgO), the coordination number is 6:6. Thus, each Mg$^{2+}$ cation is in direct contact with 6 nearest neighbour O$^{2-}$ anions. Therefore, correct answer is B.