University:
University of Cambridge
Course:
0620 IGCSE | Chemistry
Academic year:

2022
Views:

136

Pages:

2
Author:

Aku S

lewis Structure: -start with molecular formula (H₂O, CHu, Nou) -finish with lewis Structure Rules I count total valence è 9. Sum, vaknce é for each atom b. add charge Sum of all formal charges in molecule equals total charge Review vesper: lewis structure 30 shape #e graps as electron geometry #bonding groups molecular geometry EG-tet rahedral molecular bent < 109.5° Polarity: Polar molecules must have a dipole(+,-) need - must have Polar bonds. both -Can't be Symetric (different kinds of bunds) - if all bonds are eauiuilent & no one pairs, than molecule is non-polar