What is the theoretical density of crystalline K? — Solid State Chemistry Question

💡 Solution & Explanation

Density $d = \frac{Z \times M}{N_A \times a^3} = \frac{2 \times 39}{6.022 \times 10^{23} \times (5.0 \times 10^{-8})^3} = \frac{78}{6.022 \times 125 \times 10^{-1}} \approx 1.04 \text{ g/cm}^3$. Therefore, correct answer is C.