R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Physics Q. The lightest radioactive element is (A) tritium (B) polonium (C) uranium (D) deuterium 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) tritium You must be Logged in to update hint/solution 💬 Discussion 💬 Comment