Hydrogen
Oxygen
Helium
Carbon dioxide
Answer is Wrong!
Answer is Right!
The correct answer is C. Helium.
Noble gases are elements in group 18 of the periodic table. They are very stable and do not react with other elements. They are also called inert gases or rare gases.
Hydrogen is a gas that is found in the Earth’s atmosphere. It is the lightest element in the universe. Hydrogen is a flammable gas and can be used to create energy.
Oxygen is a gas that is found in the Earth’s atmosphere. It is necessary for life. Oxygen is a colorless, odorless gas that
48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube