R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Physics Q. Radio activity is due to (A) unstable nucleus (B) stable electronic configu-ration (C) stable electronic configuration (D) stable nucleus 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) unstable nucleus You must be Logged in to update hint/solution 💬 Discussion 💬 Comment