Chemistry Medium by mahashankart More quizzes in Science and Education What is the symbol for silver? Hg Au Ag Si What is the chemical formula for ammonia? CO2 NaCl H2O NH3 Which gas is found in Refrigerator? NH3 CH4 No2 CO2 Chemical symbol of Oxygen is ...? C He O2 N Iron is also known as ... ? Gold(Au) Sodium(Na) Ferrous(Fe) Cupper(Cu) Atomic number of Sodium is ? 13 11 10 12 What is the chemical formula of salt ? CuSO4 NaCl NaOH CaCO3 Atomic number of hydrogen is ? 4 2 8 1 Carbon dioxide is known as ....? O2 CO2 CaCO3 NO2 Which is more found in atmosphere ..... ? N2 Co2 O2 H2 Your result βΊοΈ Good luck next time π Not bad! ππ Good job! π₯³ Perfect! ... Try more quizzes in HICHAPP