the ability of atoms in a molecule to attract electrons to themselves

Electronegativity trend

increases as you go from left to right and from the bottom to the top

Mu, produced by two equal but opposite charges separated by a distance, r, is calculated Mu = nQr. It is measured in debyes (D)

All molecules that share a double bond and single bond between two or more of the same atoms

Exceptions to Octet Rule

1. Ions or molecules with an odd number of electrons 2. Ions or molecules with less than an octet 3. Ions or molecules with more than eight valence electrons (an expanded octet)

The strength of a bond is measured by determining how much energy is required to break the bond

Like bond energies, bond length depends on the

kind of atoms and bonds involved

As the number of electrons shared increases:

bond length shortens AND bond energy increases ⎻ More electrons share, more energy to pull them apart!

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Ch 5 Chem

Question	Answer
Electronegativity	the ability of atoms in a molecule to attract electrons to themselves
Electronegativity trend	increases as you go from left to right and from the bottom to the top
The larger the difference in electronegativity, the ____ polar the bond	More
When a polar bond is formed, we often refer to it as a	Bond dipole
Dipole moment	Mu, produced by two equal but opposite charges separated by a distance, r, is calculated Mu = nQr. It is measured in debyes (D)
Lewis structures are representations of molecules showing all _______ electrons that are both bonding and nonbonding	Valence
Subtract that from the number of valence electrons for that atom: the difference is its	Formal charge
Resonance	All molecules that share a double bond and single bond between two or more of the same atoms
Exceptions to Octet Rule	1. Ions or molecules with an odd number of electrons 2. Ions or molecules with less than an octet 3. Ions or molecules with more than eight valence electrons (an expanded octet)
Though relatively rare and usually quite unstable and reactive, there are ions and molecules with an ______ number of electrons	Odd
Bond enthalpy	The strength of a bond is measured by determining how much energy is required to break the bond
Average bond enthalpies are ________ because bond breaking is an endothermic process	Positive
As bond length increases, bonds generally get ______	Weaker
Like bond energies, bond length depends on the	kind of atoms and bonds involved
As bond type goes from single, to double, to triple bonds, bond length _________	Decreases
As the number of electrons shared increases:	bond length shortens AND bond energy increases ⎻ More electrons share, more energy to pull them apart!

Created by: user-2057611

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