Molecular Geometry Flashcards
(31 cards)
What is the formula type in molecular geometry?
AX E, wherein:
A = Number of central atom
X = Number of bonding pair
E = Number of lone pairs
Example: NH³
• • H•—•N•—•H
•
|
•
H
A = N (1)
X = H (3)
E = Lone pairs of N (1)
Formula type = AX³ E¹
It is a 3D structure of chemical compounds.
Molecular geometry
It is a model used to predict the geometry of individual molecules from the number of electron pairs sorrounding central atoms.
VSEPR Theory
The acronym VSEPR means?
Valence Shell Electron Pair Repulsion
What is the formula type and degree of linear?
Formula type: AX²
Degree: 180°
It has 1 central atom and 2 bonding pairs.
Linear
What is the formula type and degree of trigonal planar?
Formula type: AX³
Degree: 120°
It has 1 central atom and 3 bonding pairs.
Trigonal planar
What is the formula type and degree of bent?
Formula type: AX² E¹
Degree: 120°
It has 2 bonding pairs and 1 lone pair.
Bent
What is the formula type and degree of tetrahedral?
Formula type: AX⁴
Degree: 109.5°
It has 4 bonding pairs.
Tetrahedral
What is the formula type and degree of trigonal pyramidal?
Formula type: AX³ E¹
Degree: 109.5°
It has 3 bonding pairs and 1 lone pair
Trigonal pyramidal
What is the formula type and degree of V-shaped?
Formula type: AX² E²
Degree: 109.5°
It has 2 bonding pairs and 2 lone pairs.
V-shaped
What is the formula type and degree of trigonal bipyramidal?
Formula type: AX⁵
Degree: 90°
It has 5 bonding pairs.
Trigonal bipyramidal
What is the formula type and degree of seesaw?
Formula type: AX⁴ E¹
Degree: 90°
It has 4 bonding pairs and 1 lone pair.
Seesaw
What is the formula type and degree of T-shaped?
Formula type: AX³ E²
Degree: 90°
It has 3 bonding pairs and 2 lone pairs.
T-shaped
What is the formula type and degree of octahedral?
Formula type: AX⁶
Degree: 90°
It has 6 bonding pairs.
Octahedral
