What shape does an ammonia (NH3) molecule have?trigonal pyramidal
correct
In a tetrahedral molecule, how many unshared pairs of valence electrons does the central atom have? none
This answer is correct for AB4 type molecules in which the central atom has a valence of 4 and each bond has a element (in this case B) attached.
In a polar bond, electrons are? completely transferred
OK
What determines the polarity of a bond? molecular shape only
No. The polarity of a bond is determined by the electronegativity difference between the two elements forming the bond
What determines the polarity of a molecule?electronegativity difference only
No. The net polarity (net dipole moment) of a molecule is determined by two things:
a. The polarity of individual bonds, AND
b. the symmetry of the molecule.
To have a net dipole moment, a molecule MUST have both (a) individual bond polarity AND (b)the molecule must NOT be symmetrical.
Do these look right?
What shape does an ammonia (NH3) molecule have?trigonal pyramidal
In a tetrahedral molecule, how many unshared pairs of valence electrons does the central atom have? none
In a polar bond, electrons are? completely transferred
What determines the polarity of a bond? molecular shape only
What determines the polarity of a molecule?electronegativity difference only
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