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KRYP-TON 
You made it! This is the last element in the fourth period. You know what that means… An inert gas. Krypton was not discovered on some far away planet that exploded long ago. It was discovered right here on Earth by the scientists Ramsay and Travers in 1898. They were able to isolate the gas even though it is only one part per million in our atmosphere. When cooled and solidified, krypton is white while the gas form has green and orange traits. Since krypton is in the far right row of the periodic table, its outermost shell is full with eight electrons.
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