Shapes of molecules and ions
Teacher recommended
?- Created by: jp3louis
- Created on: 09-11-16 19:24
View mindmap
- Shapes of molecules and ions
- Electron-pair repulsion theory
- An electron has a negative charge.
- Electron pairs in the center determines the shape.
- Electrons repel as far as possible but lone pairs repel more.
- Elements with 4 electron pairs (like Ch4, Nh3, H20)
- CH4 has 4 bonded pairs, 0 lone pairs. This shape is a TETRAHEDRAL and the bond angle is 109.5
- NH3 has 3 bonded pairs, 1 lone pair. The shape is PYRAMIDAL and the bond angle is 107
- H20 has 2 bonded pairs, 2 lone pairs. This shape is NON LINEAR and has a bond angle of 104.5
- Elements with multiple bonds.
- BF3 has 3 electron pairs, it is a TRIGONAL PLANAR and has an angle of 120.
- CO2 has 2 electron pairs, a LINEAR shape and a bond angle of 180.
- SF6 has bonded electrons, a shape of OCTANEDRAl and a bond angle of 90.
- Quick look
- H2O - non-linear, 104.5
- CO2 - linear, 180
- BF3 - trigonal planar, 120
- NH3 - pyramidal, 107
- SF6 - octahedral, 90
- CH4 - tetrahedral, 109.5
- Electron-pair repulsion theory
Comments
Report
Report