Entry Task: Friday Nov 30 th

Entry Task: Friday Nov 30th QUESTION: Provide the Lewis Dot for CO2 You have 5 minutes!

VSPER Modeling Activity

Guide to Predicting Molecular Shape (VSEPR Theory) STEP 1 Write the electron-dot structure. STEP 2 Arrange the electron groups around the central atom to minimize repulsion. STEP 3 Use the atoms bonded to the central atom to determine the shape of the molecule.

Linear • 2 atoms attached to center atom 0 unshared pairs (lone pairs) .. .. :Cl: Be: Cl: .. .. • Bond angle = 180o • Type: EX2 • Ex. : BeCl2

Trigonal Planar • 3 atoms attached to center atom • 0 lone pairs • Bond angle = 120o • Type: EX3 • Ex. : BF3

Tetrahedral • 4 atoms attached to center atom • 0 lone pairs • Bond angle = 109.5o • Type: EX4 • Ex. : CH4

Trigonal Pyramidal • 3 atoms attached to center atom • 1 lone pair • Bond angle = 107o • Type: EX3 • Ex. : NH3 ● ●

bent O H H Bent • 2 atoms attached to center atom • 2 lone pairs • Bond angle = • General: E2X • Ex. : H2O ● ● ● ●

Cl Cl Cl P Cl Cl Trigonal Bipyramidal • 5 atoms attached to center atom • 0 lone pairs • Bond angle = • equatorial -> 120o • axial -> 90o • Type: EX5 • Ex. : PCl5

F F F S F F F Octahedral • 6 atoms attached to center atom • 0 lone pairs • Bond angle = 90o • Type: EX6 • Ex. : SF6

Part 2- Construct the following molecules Do the electron dot arrangement Do the Lewis structure Provide a drawing/ name of molecular shape After section 5 go back and predict whether the molecule is polar or non polar

Entry Task: Friday Nov 30 th