The class worksheet, one row at a time. Fill in every column for a molecule or ion, then press Check row to mark each column with an explanation. The Lewis structure and the 3-D redraw are drawn on paper first, then compared.
1 Valence e⁻
total, including the charge
2 Lewis structure
Drawn it on paper · compare
Did yours match? Yes No
3 Electron geometry
domains on the central atom
electron geometry… linear trigonal planar tetrahedral trigonal bipyramidal octahedral
4 Molecular geometry & bond angle
molecular geometry… linear trigonal planar bent tetrahedral trigonal pyramidal bond angle… 180° 120° slightly less than 120° 109.5° ≈107° (less than 109.5°) ≈104.5° (less than 109.5°)
5 Molecular geometry redraw
Drawn it in 3-D · compare
Did yours match? Yes No
6 Bond polarity?
bond polarity… all polar all nonpolar some polar, some nonpolar
7 Molecular polarity?
molecular polarity… polar nonpolar
Check row
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