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Chapter 5,6,7 pt 2
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27
Aerospace Engineering
Undergraduate 1
10/20/2013

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Cards

Term
What's the difference between an ionic and a covalent compound
Definition
-ionic: electrons are transferred
-covalents: electrons are shared
Term
two main ways to reach a noble gas configuration in terms of bonding
Definition
1. gain or lose electrons
2. share electons
Term
common electron deficient atoms in bonding are
Definition
Be and Mg and B and H
Term
an electronegativity difference <0.5
Definition
non-polar covalent bond
Term
an electronegativity difference between 0.5 and 2.0
Definition
polar covalent bond
Term
an electronegativity difference >2.0
Definition
ionic bond
Term
Formal charges on in an ionic bond have to add up to
Definition
the net charge of the compound
Term
Tips for picking best lewis structure with formal charges
Definition
1)the lower the overall charge the better
2)check for consistency in atomic trends, negative charges should be on
Term
T/F, in compounds/molecules where resonance exist, we have to draw both resonance structures to accurately represent the molecule
Definition
true
Term
Resonance structures differ only in the positions of their ...—not in the positions of their ...
Definition
electrons, atoms
Term
Exceptions to the octet rule fall into what three category
Definition
1)shortage of electrons
2)odd number of electrons/ free radicals
3)expanded octet
Term
when one atom contributes both electrons to form a bond
Definition
coordinate covalent bond
Term
What is the molecular geometry of a structure with : 2 separate bonds, 1 lone pair
Definition
bent
Term
What is the molecular geometry of a structure with : 3 separate bonds, 1 lone pair
Definition
trigonal pyramidal
Term
What is the molecular geometry of a structure with : 2 separate bonds, 2 lone pairs
Definition
bent
Term
What is the molecular geometry of a structure with : 1 lone pair and four separate bonds
Definition
see-saw
Term
What is the molecular geometry of a structure with : 2 lone pairs and 3 separate bonds
Definition
t-shape
Term
What is the molecular geometry of a structure with : 3 lone pairs and 2 separate bonds
Definition
linear
Term
What is the molecular geometry of a structure with : 1 lone pair and 5 separate bonds
Definition
square pyramid
Term
What is the molecular geometry of a structure with : 2 lone pairs and four bonds
Definition
square planar
Term
What is the molecular geometry of a structure with : 3 lone pairs and 3 bonds
Definition
t-shaped
Term
What is the molecular geometry of a structure with : 4 lone pairs and 2 bonds
Definition
linear
Term
Each group of valence electrons (includes bonding electrons and lone pairs) around a central atom want to be located as far as possible from one another. This best describes...
Definition
The VSEPR theory
Term
a ... bond restricts rotation about the bond axis while a ... bond allows almost free rotation
Definition
pi, sigma
Term
... and ... repel more strongly than single bonds
Definition
lone pairs
multiple bonds
Term
how can we determine the geometry of molecules with more than one central atom?
Definition
Determine the geometries separately
Term
two questions asked when determining if a molecule is polar
Definition
1)does the molecule have polar bonds
2)do the polar bonds cancel out
3)does the molecule have lone pairs
4)are the lone pairs opposite to each other/ cancel out?
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