Try to sound out the words ! :)
Answer:
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons
The process by which gasses spontaneously move from an are with higher concentration to one of lower concentration is called diffusion. This process mainly occurs in gases and liquids. The end result of diffusion is called dynamic equilibrium. It is a complete mixing of the molecules of the gas.
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