GKFix MCQ Question

What is the approximate density of Radon (Rn) at STP?

• A. 3.7 × 10⁻³ g/cm³
• B. 5.9 × 10⁻³ g/cm³
• C. 9.0 × 10⁻³ g/cm³
• D. 9.7 × 10⁻³ g/cm³