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.
Brazeal Dennard Chorale : Remembering, Discovering, Preserving. Review: The story of the Fisk Jubilee Singers is one of the most inspiring in all of American Music. In 1872 a history of their struggle, triumph, and music finally saw print. They sang the songs which were handed down to them by their slave ancestors.