Chapter 4

Question 1

Relative position of the groups on the central atom

Answer 1

Electron geometry

Question 2

Relative position of the atoms in a molecule

Answer 2

Molecular geometry

Question 3

Electron geometries:
Two groups of electrons:
Three groups of electrons:
Four groups of electrons:

Answer 3

Linear
Trigonometry planar
Tetrahedral

Question 4

If all electron groups are bonding groups, the molecular and electron geometry are _____

Answer 4

Same

Question 5

If one or more electron groups are nonbonding electrons then the molecular and electron geometry are ______.

Answer 5

Different

Question 6

Two electron groups:
Electron geometry: ______
Molecular geometry:_______

Answer 6

Linear, linear

Question 7

Three electron groups
Electron geometry: ______ ________
Molecular geometry: _______ ________ or ______

Answer 7

Trigonal planar
Trigonal planar or bent

Question 8

Four electron groups:
Electron geometry= ____________
Molecular geometry= ___________, ________ _________, or _______

Answer 8

Tetrahedral
Tetrahedral, trigonal pyramidal, or bent

Question 9

Tetrahedral angle is _______. Also true for trigonal pyramidal and bent (4 electron groups)

Answer 9

109.5

Question 10

Trigonal planar angle is ______. Also true for bent (3 electron groups)

Answer 10

120

Question 11

Linear angle is ____

Answer 11

180

Question 12

__________ bonds are 2 atoms sharing electrons

Answer 12

Covalent
(Sharing is not always equal)

Question 13

Ability of an atom, when part of a covalent bond, to draw electrons towards its nucleus

Answer 13

Electronegativity

Question 14

Electronegativity determines if a bond is ______ or ________

Answer 14

Polar or nonpolar

Question 15

Uneven electron distribution leads to partial charges (polar):
Atom with a greater electron density has partial _______ charge
Atom with lesser electron density has partial ________ charge

Answer 15

Negative
Positive

Question 16

Covalent bonds with dipoles = ______ bonds

Answer 16

Polar

Question 17

________ bonds form between atoms of similar electronegativity, even electron distribution, no partial charges or dipoles

Answer 17

Nonpolar

Question 18

If its _______ all groups attached to the central atom are the exact same and all of the bond dipoles pull away from the central atom. Only ______ bonds.

Answer 18

Nonpolar

Question 19

If its _____ it needs at least one ______ bond and a lone pair on the central atom is a big giveaway.

Answer 19

Polar

Question 20

Covalent bond= result of ___________ forces of attraction in one molecule

Answer 20

Intramolecular

Question 21

Attractions between molecules in liquid and solid states
-are much weaker than covalent bonds
-determine physical properties of a compound: boiling point, melting point, solubility

Answer 21

Intermolecular forces of attraction

Question 22

Intermolecular forces of attraction form between a _________ charge on one molecule and the __________ partial charge on another

Answer 22

Partial, opposite

Question 23

Three types of intermolecular forces:

Answer 23

Dispersion forces, dipole-dipole forces, hydrogen bonding

Question 24

Weakest intermolecular force. Common to all compounds and elements.

Answer 24

Dispersion forces

Question 25

Compound with _____ molecules have _____ dispersion forces than compounds with smaller molecules

Answer 25

Larger, stronger

Question 26

Elements with _______ atoms have _______ dispersion forces than molecules with smaller elements.

Answer 26

Larger, stronger

Question 27

Form between oppositely charged ends of polar molecules. Form between permanent dipoles. Are stronger than dispersion forces

Answer 27

Dipole-dipole forces

Question 28

Strongest of the intermolecular forces. Must have H covalently bonded to F, O, or N. That H must interact with another F, O, or N on another molecule

Answer 28

Hydrogen bonding forces

Question 29

Determining intermolecular forces of attraction!!! Determine if the molecule is ______ or ________. Dispersion forces only: _______ Dispersion and dipole dipole forces:_______ Some _____ molecules will contain hydrogen bonding

Answer 29

Polar or Nonpolar Nonpolar Polar Polar