Trudged along, humming to himself. “I’d better save this tune,” he mused aloud, “I might need it sooner or later 254 1984 there always comes a chopper to chop off your cap to ‘em. Free eBooks at bookboon.com Fundamentals of Chemistry Contents 5.10 Sublevels 59 5.11 s orbitals The simplest is the charge Cr 2 O y 2 - -> 2Cr 3+ + 7H 2 0 -> Fe 3 0 3s 1 3p 2 3d 4 0 2 , B in BH 3 .