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17 Cards in this Set
- Front
- Back
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What is the rule for Zeff (nuclear charge)?
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Zeff increases going across and decreases going down.
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What is the rule for atomic radii?
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Atomic Radii increases going down a group BUT decreases going across a row.
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What is the rule of ionic radii?
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Cations are smaller than the netural atom
AND Anions are LARGER than the neutral atom. |
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What is the rule for ionization energies?
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Ionization energies decrease going down and increase going across.
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What is the rule for electron affinity?
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Electron affinity decreases going down and increases going across.
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What is the rule for lattice energies?
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Energy released is negative lattice energy and energy absorbed is positive lattice energy.
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What is the formula for Formal Charge?
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FC = Valence Electrons - unshared electrons -# of bonds.
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Define resonance structure:
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Ways to draw bonds from elements.
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Define Coordination #:
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CN tells us how many bonds are connected to the central atom.
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Tips for molecular structures:
(lone pairs and bonds) |
unpaired electrons count as a charge cloud (:)
Double Bonds are stronger and shorter than single bonds. |
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Define hybrid orbital:
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The mixing of orbitals together.
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Define Valence Bond Model:
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The overlapping of orbitals in a covalent bond.
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What are pi bonds?
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Pi bonds occur in molecules with double or triple bonds that overlap the two p orbitals.
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A double bond is a _______.
A single bond is a _______. |
A double bond is a sigma bond and a pi bond.
A triple bond is one sigma bond and two pi bonds. |
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what is a sigma bond?
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a sigma bond has orbital overlap directly between the two elements in the center.
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what is paramagnetic?
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paramagnetic is when electrons unpaired are drawn into an magnetic field.
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what is diamagnetic?
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Diamagnetic is when there are ZERO unpaired electrons.
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