✅ Correct Answer: Hydrogen
Source: This question is taken from the Everyday Science
✅ Correct Answer: Grass
✅ Correct Answer: Oxygen
✅ Correct Answer: Emphysema
✅ Correct Answer: 3 feet
✅ Correct Answer: 60% Nitrogen, 40%inert gases
✅ Correct Answer: 1.225 kg/m3
✅ Correct Answer: radio active gas
✅ Correct Answer: Ascorbic Acid
✅ Correct Answer: Metrology
✅ Correct Answer: A class of nucleic acids
✅ Correct Answer: Groups
✅ Correct Answer: Satellite
✅ Correct Answer: inverted
✅ Correct Answer: Mercury
✅ Correct Answer: Ununoctium
✅ Correct Answer: acellular