Chapter 8: Bonding Flashcards
What is bond energy?
Energy required to break a chemical bond
Indicates the strength of a bonding interaction
When does ionic bonding occur
Occurs when an atom that loses electrons easily reacts with an atom that has high affinity for electrons
What is the purpose of coulombs law
Determines the energy of interaction between a pair of ions
True or false: A bond will form if the energy
of the aggregate is lower than that of the separated atoms
True
What is bond length
Distance between two atoms when potential energy is minimal
What is a polar covalent bond
Bond in which the electrons are not shared equally because one atom attracts them more strongly than the other
What is electronegativity
Ability of an atom in a molecule to attract shared electrons to itself
Polarity of bonds ________ as difference in electronegativity increases
increases
What is the dipole moment
Property of a molecule possessing a center of positive and negative charge
what can be said about the distance between ions in a solid state of ionic compounds
- Ions are relatively close together
- Many ions are simultaneously interacting
what can be said about the distance between ions in a gas phase of ionic compounds
Ions are relatively far apart
Factors that influence ionic size are based on what?
(2)
**Size of the parent atom
**- Cation is smaller than its parent atom
- Anion is larger than its parent atom
**Position of the parent element in the periodic table
**
- Ion sizes increase down a group
What are isoelectronic ions
Series of ions that contain the same number of electrons
Size DECREASES with incresing atomic number
What is the opterational definition of ionic compounds
Any compound that conducts an electric current when melted
What rule does hydrogen follow for lewis structures
The duet rule
