CH 301 Study Guide - Midterm Guide: Trigonal Bipyramidal Molecular Geometry, Trigonal Planar Molecular Geometry, Trigonal Pyramidal Molecular Geometry
Document Summary
Multiple-choice questions may continue on the next column or page nd all choices before answering. Rank the following atoms in terms of decreas- ing atomic radius: na, n, o, mg, f, f, o, n, na, mg, f, o, n, mg, na, na, mg, n, o, f correct, f, mg, na, o, n. As you move down the periodic table atomic radius increases because the shielding e ects of inner electrons reduces the e ective nuclear charge experienced by outer shell elec- trons. As you move across the periodic table the radius decreases because electrons are be- ing added to the same electronic shell (and thus do not add additional shielding e ects) while the number of protons increases. Na, being farthest left and down the table, would be the largest while f, being farthest right and up the table, would be the smallest. The predicted geometry of icl3 would be: t-shaped. correct, trigonal bipyramidal, trigonal pyramidal, trigonal planar, linear.
