colourless gas|What is carbon dioxide (CO₂) guide for KS3 chemistry students,tashay oung

noble gas, any of the seven chemcolourless gasical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). The noble gases are colourless, odourless, tasteless, nonflammable gases.

Nitrogen, nonmetallic element of Group 15 [Va] of the periodic table. It is a colorless, odorless, tasteless gas that is the most plecolourless gasntiful element in Earth’s atmosphere and is a constituent of all living matter. Its atomic number is 7 and it。

Sulfur dioxide, SO2, is a colourless gas or liquid that has a strong, odorous smell. It is derived from the burning of fossil fuels (coal and oil) and the smelting of sulphur-containing mineral ores (aluminium, copper, zinc, lead and iron).

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