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
Shape of AsBr3
trigonal pyramidal
____________________ is the energy required to break the bond between two covalently bonded atoms.
Resonance energy
Bond dissociation energy
Hybridization energy
none of the above
A triple covalent bond shares how many total electrons?
6
what is the shape of CCl4
tetra-hedral
________________ occur when polar molecules are attracted to one another.
hydrogen bonds
none of the above
Dipole interactions
ionic compounds
Which of the following atoms would most likely form a diatomic molecule?
hydrogen
all of these
nitrogen
oxygen
In a coordinate covalent bond, ________________________________.
one atom contributes both electrons to a coordinate covalent
electrons are shared unequally
none of the above
electrons are shared equally
Intermolecular attractions are _________ than either ionic or covalent bonds.
stronger
both weaker and stronger
none of these
weaker
What is the shape of H2O?
bent
Special properties of water, such as adhesion, cohesion, and surface tension can be attributed to which intermolecular force?
Van de waals forces
---
Hydrogen bonds
london dispersion forces
Molecular compounds are generally composed of what kinds of atoms?
non-metals
How many pi bonds are there in a triple bond?
1
2
3
The VSEPR model is mainly used to __________________________________.
measure intermolecular forces
determine ionic charge
write resonance structures
determine molecular shape
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.
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
Covalent bonds form when atoms ________ electrons.
share
__________ bonds form between single bonds.
sigma
pi
beta
alpha
Water is an example of a ___________ molecule
non-polar
polar
---
ionic
Which of the following elements has the greatest electronegativity?
Chlorine
Bromine
Fluorine
Iodine
Unequal sharing of electrons between two bonded atoms ALWAYS indicates __________________.
a polar ionic bond
a polar covalent bond
a nonpolar covalent bond
an ionic bond
How many pairs of electrons are shared in a double covalent bond?
2 pairs
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
Shape of CO2
linear
Which of the following elements has 4 valence electrons?
Sulfur
Boron
Nitrogen
Carbon
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