Chemistry 4th Midterm Review of Basics

how do you calculate steric number?

• (# of lone pairs + # of bonded pairs)/2

• (# of lone pairs on central atom + # of bonded pairs on central atom)/2

• # of lone pairs on central atom + # of bonded pairs on central atom

• # of lone pairs + # of bonded pairs

Select all correct Info:

• Eg=trigonal planar

• Eg=linear

• Mg=linear

• BA=180 degrees

• Mg=bent

Select all correct Info:

• AX2E

• AX2

• Steric number=2

• lone pairs=0

• lone pairs=1

What does the A stand for in "AXE"

• central atom

• ligand atoms

• electron pair

What does the X stand for in "AXE"

• central atom

• ligand atoms

• electron pair

What does the #s next to X in "AXE," also signify (EX/ AX2E)

• Number of electron pairs

• Steric Number

• Number of Lone pairs

• Number of bonded pairs

What does the #s next to E in "AXE," also signify (EX/ AX2E2)

• Number of electron pairs

• Steric Number

• Number of Lone pairs

• Number of bonded pairs

What does the #s next to E in "AXE," cause to the #s next to X (EX/ AX2E2)

• The bond angle changes by lone pair amount

• It causes the steric number to be subtracted by the lone pair amount

• Example specific:

  Steric number:4 --> X4

  X4-E2=X2

  --> AX2E2

• Has no impact

Select all correct info:

• Eg=tetrahedral bipyramidal

• Eg=trigonal planar

• Mg=trigonal planar

• BA: 120 degrees

• BA: 90 degrees

Select all correct info:

• AX3E

• steric number = 3

• AX3

• lone pairs = 0

• lone pairs = 1