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Electronegativity & Polarity
Key Terms
Lewis Structures
True/False
Geometry
100
Partially charged atoms held together by unequally shared electrons.
What is a polar covalent bond?
100
The chemical formula that conveys with the smallest possible whole numbers the ratio of combination of elements in a compound.
What is empirical formula?
100
The number of single bonds in N2F2.
What is 2 (F-N=N-F)
100
The central atom in a Lewis structure can have fewer than eight electrons due to a shortage of electrons or an odd number of electrons.
What is true (exceptions 1 & 2)?
100
The electronic geometry of CO2.
What is linear geometry?
200
The arrowhead of a dipole for the molecule, H2CO, points toward this atom.
What is oxygen?
200
Two or more equally valid Lewis structures for a single molecule that differ only in the positions of electrons.
What are resonance structures?
200
The number of lone pair electrons in POCl3.
What is 11 (O=P-..)
200
Usually, a double bond consists of one sigma bond and one pi bond.
What is true?
200
The molecular geometry of H2CO.
What is trigonal planar geometry?
300
The measured dipole moment of BaO, given that the BaO bond has 85.3 percent ionic character and the BaO bond length is 194 pm.
What is 15.9D?
300
A pair of valence electrons that are not involved in covalent bond formation.
What is lone pair?
300
The number of single bonds if the Lewis structure of SiF6.
What is 6 (expanded octet)?
300
Bond angles of molecules are NOT affected by lone pair electrons.
What is false (VSEPR)?
300
The molecular geometry of NH3.
What is trigonal pyramidal?
400
Describes the type of bond of the SiSi bond in Cl3SiSiCl3.
What is covalent (the 2 Si are the same)?
400
Atoms share electrons when an atomic orbital on one atom overlaps with an atomic orbital on the other.
What is valence bond theory?
400
The number of resonance structures for CCl2O.
What is 3 (O=C-...)?
400
VSEPR stands for valence-shell electron-pair resonance.
What is false (valence-shell electron-pair Repulsion)?
400
The electron geometry of water.
What is tetrahedral?
500
Describes the type of bond of the CaF bond in CaF2.
What is ionic (the dEN = 3.0)?
500
An experimental determination of an empirical formula by a reaction with oxygen to produce carbon dioxide and water.
What is combustion analysis?
500
The formal charge on nitrogen and oxygen for the Lewis structure of (NO2)+.
What is +1 (N) and 0 (O)?
500
Combustion analysis is used to determine the empirical formula of a compound.
What is true?
500
The molecular geometry of SF4.
What is see-saw geometry?