Special properties of water, such as adhesion, cohesion, and surface tension can be attributed to which intermolecular force?
Hydrogen bonds
Van de waals forces
---
london dispersion forces
The VSEPR model is mainly used to __________________________________.
measure intermolecular forces
write resonance structures
determine ionic charge
determine molecular shape
Covalent bonds form when atoms ________ electrons.
share
Compare and contrast polar covalent bond and non-polar covalent bond. Be sure to include information on electronegativity, electron sharing, etc.
Polar covalent bonds have an electronegativity diff.of 0.4-1.7; electrons aren’t shared equally. Non-polar electronegativity diff. of 0 shared equally
How many pi bonds are there in a triple bond?
3
1
2
What is the VSEPR model theory? What does it state?
States the electron pairs repel each other and determine both the shape of & bond angles in a molecule.
A triple covalent bond shares how many total electrons?
6
Shape of CO2
linear
Water is an example of a ___________ molecule
---
ionic
non-polar
polar
How does electronegativity influence the character of a bond between atoms?
The difference in electronegativity determines the character of a bond between atoms (determines if it will be polar or non-polar
__________ bonds form between single bonds.
sigma
beta
pi
alpha
Unequal sharing of electrons between two bonded atoms ALWAYS indicates __________________.
an ionic bond
a nonpolar covalent bond
a polar ionic bond
a polar covalent bond
How many pairs of electrons are shared in a double covalent bond?
2 pairs
Shape of AsBr3
trigonal pyramidal
What is the shape of H2O?
bent
Compare and contrast the properties of ionic and covalent compounds.
ionic - crystalline structure, metals +nonmetals, high melting point. Covalent - nonmetals, properties vary, low melting point, etc see p. 253 for better list
Which of the following elements has 4 valence electrons?
Sulfur
Nitrogen
Carbon
Boron
Intermolecular attractions are _________ than either ionic or covalent bonds.
weaker
stronger
both weaker and stronger
none of these
________________ occur when polar molecules are attracted to one another.
Dipole interactions
none of the above
hydrogen bonds
ionic compounds
Which of the following atoms would most likely form a diatomic molecule?
all of these
hydrogen
nitrogen
oxygen
____________________ is the energy required to break the bond between two covalently bonded atoms.
none of the above
Hybridization energy
Bond dissociation energy
Resonance energy
Molecular compounds are generally composed of what kinds of atoms?
non-metals
Which of the following elements has the greatest electronegativity?
Fluorine
Iodine
Bromine
Chlorine
In a coordinate covalent bond, ________________________________.
electrons are shared unequally
electrons are shared equally
none of the above
one atom contributes both electrons to a coordinate covalent
what is the shape of CCl4
tetra-hedral
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