Generally, the more empty the outer electron shell, the more reactive the element. Helium has two(2) electrons, and is thus full, all the other noble elements has eight(8) electrons in it's outer electron shell, so they are also full. *And for everyone's sake, krypton is not green, but colorless, and forms white crystals when solid.
(a) Jubilees was written between 153 B.C. and the year of Hyrcanus' breach with the Pharisees. (1) It was written during the pontificate of the Maccabean family, and not earlier than 155 B.C., when this office was assumed by Jonathan the Maccabee.
The Canterbury Tales is a collection of 24 stories that runs to over 17,000 lines written in Middle English by Geoffrey Chaucer between 1387 and 1400. In 1386, Chaucer became Controller of Customs and Justice of Peace and, in 1389, Clerk of the King's work. It was during these years that Chaucer began working on his most famous text, The Canterbury Tales. The tales are presented as part of a story-telling contest by a group of pilgrims as they travel together on a journey from London to Canterbu