The image reflects the use of the element in the welding industry. argon provides an inert atmosphere in which welded metals will not oxidise. argon is a colourless, odourless gas that is totally inert to other substances. argon makes up 0.94% of the earth’s atmosphere and is the third most abundant atmospheric gas. based on the periodic table information for argon below, what other details can you interpret about one atom of the gas?