What is the smallest unit of an element retaining its properties? 👤 By The Quiz Wire 🌐 Source Chemistry Knowledge Base ✅ Fact Checked 📊 Difficulty Easy 📅 Last Updated 01 Dec 2025 A. Molecule B. Atom C. Proton D. Electron Check Answer 💡 Explanation: An atom is the smallest unit of an element that maintains the chemical properties of that element. 📚 Topics: Chemistry Science 🎯 Exams: CSS GEN NTS PMS