Chemistry 121 Chapter 9

Front 1

What is the AB_n model for identifying molecular shapes?

Back 1

It is a formula used to define molecular shapes. A=central atom. A is bonded to n number of B atoms. The possible shapes of AB_n molecules depends on value of n.

Front 2

What are the possible shapes for an AB_2 molecule?

Back 2

Linear and Bent

Front 3

What are the possible shapes of an AB_3 molecule?

Back 3

Trigonal planar, trigonal pyramidal, T-shaped

Front 4

What are the possible shapes for an AB_4 molecule?

Back 4

?

Front 5

What are the possible shapes for an AB_5 molecule?

Back 5

?

Front 6

What are the possible shapes for an AB_6 molecule?

Back 6

?

Front 7

What is electron-domain geometry?

Back 7

It is the arrangement of electron domains about the central atom of an AB_n molecule or ion.

Front 8

What are the bond angles of an AB_2 molecule?

Back 8

180 degrees=linear
>180 degrees=bent

Front 9

What are the bond angles of an AB_3 molecule?

Back 9

120 degrees=trigonal planar

For the rest, ?

Front 10

What are the bond angles for AB_4 molecules?

Back 10

109.5 degrees=tetrahedral

For the rest, ?

Front 11

What are the bond angles for AB_5 molecules?

Back 11

90 degrees and 120 degrees=trigonal bipyramidal

For the rest, ?

Front 12

What are the bond angles for AB_6 molecules?

Back 12

90 degrees=octahedral

For the rest, ?

Front 13

What are bonding pairs of electrons?

Back 13

When two atoms form a covalent bond, it is the region in which the electrons that are shared between the two atoms are most likely to be found.

Front 14

What are nonbonding pairs of electrons or lone pairs of electrons?

Back 14

An electron domain that is located principally on one atom.

Front 15

What is an electron domain?

Back 15

A region where electrons are most likely to be found on atoms in molecules.

Front 16

What are the number of electron domains for nonbonding, single, double and triple bonds?

Back 16

Each nonbonding pair of electrons, single bonds, and multiple bonds only constitute one electron domain (i.e on group of electrons). E.g. there are not 3 electron domains in a triple bond).

Front 17

What is the difference between electron-domain geometry and molecular geometry?

Back 17

Electron-domain geometry defines the arrangement of electron domains about the central atom of an AB_n molecule. Molecular geometry only defines the arrangement of atoms. Molecular geometry does not take into account lone pair of electrons.

Front 18

What is the difference between electron-domain geometry and molecular geometry?

Back 18

Electron-domain geometry defines the arrangement of electron domains about the central atom of an AB_n molecule. Molecular geometry only defines the arrangement of atoms. Molecular geometry does not take into account lone pair of electrons.

Front 19

What is the electron-domain geometry of an AB_n molecule with 2 electron domains?

Back 19

Linear

Front 20

What is the molecular geometry of an AB_n molecule with 2 bonding domains and 0 nonbonding domains?

Back 20

Linear

Front 21

What is the electron domain geometry of an AB_n molecule with 2 bonding domains and 0 nonbonding domains?

Back 21

Linear

Front 22

What is the electron-domain geometry of an AB_n molecule with 3 electron domains?

Back 22

Trigonal planar

Front 23

What is the molecular geometry of an AB_n molecule with 3 bonding domains and 0 nonbonding domains?

Back 23

Trigonal Planar

Front 24

What is the electron domain geometry of an AB_n molecule with 3 bonding domains and 0 nonbonding domains?

Back 24

Trigonal Planar

Front 25

What is the molecular geometry of an AB_n molecule with 2 bonding domains and 1 nonbonding domains?

Back 25

Bent

Front 26

What is the electron domain geometry of an AB_n molecule with 2 bonding domains and 1 nonbonding domains?

Back 26

Trigonal planar

Front 27

What is the electron-domain geometry of an AB_n molecule with 4 electron domains?

Back 27

Tetrahedral

Front 28

What is the molecular geometry of an AB_n molecule with 4 bonding domains and 0 nonbonding domains?

Back 28

Tetrahedral

Front 29

What is the molecular geometry of an AB_n molecule with 3 bonding domains and 1 nonbonding domains?

Back 29

Trigonal pyramidal

Front 30

What is the molecular geometry of an AB_n molecule with 2 bonding domains and 2 nonbonding domains?

Back 30

Bent

Front 31

What is the electron domain geometry of an AB_n molecule with 3 bonding domains and 1 nonbonding domains?

Back 31

Tetrahedral

Front 32

What is the electron domain geometry of an AB_n molecule with 2 bonding domains and 2 nonbonding domains?

Back 32

Tetrahedral

Front 33

What is the electron-domain geometry of an AB_n molecule with 5 electron domains?

Back 33

Trigonal bipyramidal

Front 34

What is the molecular geometry of an AB_n molecule with 5 bonding domains and 0 nonbonding domains?

Back 34

Trigonal bipyramidal

Front 35

What is the molecular geometry of an AB_n molecule with 4 bonding domains and 1 nonbonding domains?

Back 35

Seesaw

Front 36

What is the molecular geometry of an AB_n molecule with 3 bonding domains and 2 nonbonding domains?

Back 36

T-shaped

Front 37

What is the molecular geometry of an AB_n molecule with 2 bonding domains and 3 nonbonding domains?

Back 37

Linear

Front 38

What is the electron domain geometry of an AB_n molecule with 5 bonding domains and 0 nonbonding domains?

Back 38

Trigonal bipyramidal

Front 39

What is the electron domain geometry of an AB_n molecule with 4 bonding domains and 1 nonbonding domains?

Back 39

Trigonal bipyramidal

Front 40

What is the electron domain geometry of an AB_n molecule with 3 bonding domains and 2 nonbonding domains?

Back 40

Trigonal bipyramidal

Front 41

What is the electron domain geometry of an AB_n molecule with 2 bonding domains and 3 nonbonding domains?

Back 41

Trigonal bipyramidal

Front 42

What is the electron-domain geometry of an AB_n molecule with 6 electron domains?

Back 42

Octahedral

Front 43

What is the molecular geometry of an AB_n molecule with 6 bonding domains and 0 nonbonding domains?

Back 43

Octahedral

Front 44

What is the molecular geometry of an AB_n molecule with 5 bonding domains and 1 nonbonding domains?

Back 44

Square pyramidal

Front 45

What is the molecular geometry of an AB_n molecule with 4 bonding domains and 2 nonbonding domains?

Back 45

Square planar

Front 46

What is the electron domain geometry of an AB_n molecule with 6 bonding domains and 0 nonbonding domains?

Back 46

Octahedral

Front 47

What is the electron domain geometry of an AB_n molecule with 5 bonding domains and 1 nonbonding domains?

Back 47

Octahedral

Front 48

What is the electron domain geometry of an AB_n molecule with 4 bonding domains and 2 nonbonding domains?

Back 48

Octahedral

Front 49

In terms of repulsion, what is the difference between lone pair electrons and bonding pair electrons in VSEPR models?

Back 49

Lone pair electrons have a greater repulsion than bonding electron pairs because lone pair electrons are closer to the nucleus.