4.3-4 Bond Polarity And Dipole Moments

Question 0

What is a molecule with a dipole moment?

Answer 0

A molecule with both a center of + charge and a center of - charge

Question 1

Define a dipolar molecule

Answer 1

It has a center of + charge and a center of - charge

Question 2

Name the types of molecules with polar bonds but no resulting dipole moment

Answer 2

Linear molecules w 2 identical bonds
Planar molecules w 3 identical bonds, 120 degrees apart
Tetrahedral molecules w 4 identical bonds 109.5 degrees apart

Question 3

Will any diatomic molecule with a polar bond have a dipole moment?

Answer 3

Yes

Question 4

When the difference in electronegativity increases, so does

Answer 4

The polarity of the bond

Question 5

Order the following bonds according to polarity H-H, O-H, Cl-H, S-H, F-H

Answer 5

H-h (0 en difference)
S-h
Cl-h
O-h
F-h

Question 6

How can a molecule have a polar bond but no dipole moment?

Answer 6

The bond polarities are arranged such that they cancel each other out (they are in opposition)

Question 7

When 2 __________ react to form a covalent bond, they share e- in a way that completes the valence e- configurations of both atoms

Answer 7

Nonmetals

Question 8

In a covalent bond, with 2 nonmetals, both nonmetals attain what type of e- configs

Answer 8

Noble gas

Question 9

When a nonmetal and a representative group metal react to form a binary ionic compiund, how do both ions achieve noble gas e- configs?

Answer 9

The valence orbital of the nonmetal take the e- from the valence orbitals of the metal so that the nonmetal has the e-config of the next noble gas and the valence orbitals of the metal are emptied.

Question 10

In a series of isoelectronic ions, size decreases as atomic number

Answer 10

Increases

Question 11

Size of an ion generally (decreases/increases) down a group

Answer 11

Decreases

Question 12

What are isoelectronic ions?

Answer 12

Ions containing the same # of electrons