MOLECULAR SHAPES Dustin Rohrbach and Deven Messner.

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Presentation transcript:

MOLECULAR SHAPES Dustin Rohrbach and Deven Messner

WHAT ARE MOLECULAR SHAPES?  3 dimensional structures that represent different compounds  Each compound has a steric number and may have lone pairs

This chart will match all of the shapes to the steric number and lone pairs. Refer back to this chart throughout the tutorial for help.

STERIC NUMBER  The steric number is the number of bonds in a compound In this example of BeCl 2, the steric number is 2 Because of the two bonds on each side of the Be. Cl Be Cl Notice: Steric # -2 Lone pair -0 Linear Refer to chart on slide 3

LONE PAIRS  Lone pairs are any extra pairs of electrons left over that don’t fit into any bonds In this example of SF 4, There is one pair of elections That does not fit into any bonds and that is left over. F F S F F Notice: Steric # - 4 Lone pair – 1 Trigonal pyramidal Refer to chart on slide 3

#1 What would be the steric number and lone pairs in CCl 4 ? A. S# - 3 LP – 0 S# - 3 LP – 0 B. S# - 4 LP – 0 S# - 4 LP – 0 C. S# - 4 LP – 1 S# - 4 LP – 1 D. S# - 4 LP - 2 S# - 4 LP - 2

I’m sorry, you got it wrong. Try again!! Back to question

Good job, You’re correct! Next Question

#2 If the Steric number in PCl 5 is 5 and the Lone pair is 0, then what would be the molecular shape? A. Trigonal pyramidal Trigonal pyramidal B. Linear Linear C. Trigonal planer Trigonal planer D. Trigonal bipyramidal Trigonal bipyramidal

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# 3 What would be the Steric number and lone pair in SF 4 ? A. S# - 5 LP – 1 S# - 5 LP – 1 B. S# - 4 LP – 1 S# - 4 LP – 1 C. S# - 2 LP – 0 S# - 2 LP – 0 D. S# - 4 LP - 0 S# - 4 LP - 0

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Good job, You’re correct! Next Question

#4 What would be the molecular shape of ClF 3 ? A. Octahedral Octahedral B. T-Shaped T-Shaped C. Seesaw Seesaw D. Bent (Angular) Bent (Angular)

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#5 If the Steric number in XeF 4 is 6 and the Lone pair is 2, then what would be the molecular shape? A. Linear Linear B. Tetrahedral Tetrahedral C. Seesaw Seesaw D. Square Planar Square Planar

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Good job, You’re correct! Next Question

Good job on completing the tutorial. Remember to pay close attention to the steric number and lone pairs! That determines what the molecular shape will be.

WORKS CITED  Worksheets from class  Examples from Mr. Wolfe Thank you to Mr. Wolfe for all the help completing this