(Encyclopedia) silicon, nonmetallic chemical element; symbol Si; at. no. 14; interval in which at. wt. ranges 28.084–28.086; m.p. 1,410℃; b.p. 2,355℃; sp. gr. 2.33 at 25℃; valence usually +4. Silicon…
(Encyclopedia) boaboabōˈə [key], name for live-bearing constrictor snakes of the family Boidae, found mostly in the Americas. This family, which also comprises the egg-laying pythons of the Old World…
Nancy Drew: The Complete SeriesSeventy years of mysteries for the girl detective by Holly Hartman Send this Page to a Friend! 1. The Secret of the Old Clock (…
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