French translation of 'piles'. (= 1  neat stack) pile f in a neat pile soigneusement empilÃ©s â The clothes were folded and in a neat pile. Les vÃªtements Ã©taient pliÃ©s et soigneusement empilÃ©s. to put sth in a pile empiler qch. to be stacked in a pile Ãªtre empilÃ© â The dirty plates had been stacked in a pile on the table.
Types Of Gases. There are many Types Of Gases. Gas is one of the four basic states of matter. The other three are plasma, liquid, and solid. There are so many types of gases that are usually categorized as bulk gases. Some of the most common ones include; Propylene, Nitrous Oxide, Nitrogen, Oxygen, Carbon Dioxide, Helium, Hydrogen, and Argon.
The only chemical elements which are stable single atom molecules at standard temperature and pressure (STP), are the noble gases. These are helium, neon, argon, krypton, xenon and radon. The heavier noble gases can form chemical compounds, but the lighter ones are non-reactive or inert. For example, helium, being the simplest noble gas, has only two electrons, thus meaning it is satisfied with a complete outer shell, making it relatively non-reactive, hence it is a noble gas.