Valence Shell Electron Pair Repulsion Theory Flashcards
Lewis dot is
2d
Molecular geometry is the _ arrangement of atoms within a molecule
3d
VSEPR acronym
Valence Shell Electron Pair Repulsion
VSEPR allows scientists to predict the 3D shape of a
Molecule that is centered around a central atom
VSEPR shows a molecule’s appearance in the
3d
Electrons repel each other so round an atom they need to find
Positions with smallest repulsion
VSEPR rule electron pairs in valence shell of an atom will
Repel or move away from each other
VSEPR rule, nonbonded electron pairs are found closer to atom and
Exhibit more repulsion than bonded pairs
VSEPR molecules have _ basic shapes
5
VSEPR shapes (L,TP)
Linear
Trigonal planar
VSEPR shapes (T,TB)
Tetrahedral
Trigonal bipyramidal
VSEPR shapes (O)
Octahedral
_ are treated just like single bonds in VSEPR diagram (2)
Double covalent bonds
Triple covalent bonds
How double and triple covalent bonds are treated the same as single in VSEPR
Represented with a single bar
Atoms arrange themselves to be as _ as possible
Far away from each other
Beryllium fluoride has _ bonds
Two
The fluorine atom wants to be as far away from each other as possible otherwise
Their electrons will repel
Being as far away as possible, fluorine atoms occupy _ degree angle
180 (linear)
BF3 has three bonds, so _ doesn’t work
Linear
VSEPR shapes are formed by
Bonded atoms wanting to be as far away from each other as possible
3 atoms bonded make a _ shape
Triangle
Trigonal planar have _ degrees
120
4 around a central atom is _ around carbon
4 hydrogen
Once we have 4 around a central atom, we utilize
Third dimension
