Shape
IMFs
Molecular Polarity
More IMFs
Practice
100
How many bonded pairs (of electrons) does a tetrahedral molecule have?
4 bonded pair of electrons
100
What is the weakest IMF?
London dispersion
100
What is the electronegativity range for polar covalent molecules?
0.3-1.7
100
Is Hydrogen bonding or dipole-dipole stronger?
Hydrogen bonding is stronger than dipole-dipole
100
What is the bond type of a molecule with an electronegativity of 2.1?
Ionic
200
True or False: Pyramidal is always symmetrical
False: Pyramidal is always non-symmetrical
200
How does dipole-dipole form?
A polar covalent molecule has a partial positive and partial negative region causing a dipole
200
What is electronegativity?
measure of the ability of an atom to remove another atom's electrons
200
What are IMFs?
Forces between molecules that hold a substance together
200
Is CF4 symmetrical or non symmetrical?
symmetrical
300
What shape is the molecule SO2?
Bent
300
What atoms must hydrogen be bonded to for Hydrogen Bonding?
Oxygen, Nitrogen, or Fluorine
300
Is H2O polar or non polar?
polar
300
What is london dispersion?
Electron movement that sometimes causes them to bunch together, creating aa temporary dipole
300
What shape is HF and what IMFs does it have?
Shape: linear IMFs: london dispersion, dipole-dipole, hydrogen bonding
400
What does the shape of a molecule determine?
Polarity
400
What forces does MgO have?
Ionic forces
400
True or False: If bond polarities are symmetrical, the molecule is polar
False: If bond polarities are symmetrical, the molecule is non polar
400
True or False: The stronger the IMF, the higher the boiling point
True
400
What does VSEPR stand for?
Valence, Shell, Electron, Pair Repulsion
500
What shape is the molecule BH3
Trigonal Planar
500
What do IMFs cause?
They cause phase changes to occur
500
As you move from left to right across the periodic table, does the electronegativity increase or decrease?
The electronegativity increases
500
Does CH4 or CH3Cl have a higher boiling point?
CH3Cl
500
List the molecules in order from lowest boiling point to highest boiling point; CCl4, SO2, CH4, H2O, NH3
CH4, CCl4, SO2, NH3, H2O
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