elements 2 5 18 29 and 33 are colorless odorless unreactive gases. of theses gases element 29 has the largest atomic mass

labor day, patriot day, leaves start to change colors then fall from the tree

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as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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