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Section 4
100
Give an example of a diatomic molecule found in earth's atmosphere.
What is Oxygen, Nitrogen, or Hydrogen
100
is the result of electron sharing in covalent bonds?
What is in covalent electron, sharing usually occurs so that atoms attain the electron configuration of the noble gases.
100
What's a bonding orbital?
What is a molecular orbital that can be occupied by two electrons of a covalent bond.
100
What is a nonpolar covalent bond?
What is when the atoms in a bond pull equally, the bonding electrons are shared equally.
200
What information does a molecular formula provide?
What is Molecular formulas show how many atoms of each element one molecule of a compound contains.
200
How is an electron dot structure used to represent a covalent bond?
What is Two dots represent each bond
200
What's a sigma bond?
What is a molecular orbital that is symmetrical around the axis connecting two atomic nuclei.
200
A covalent bond between atoms in which the electrons are shared unequally.
What is polar bond / polar covalent bond
300
How are the melting points and boiling points of molecular compounds usually different from those of ionic compounds?
What is molecular compounds tend to have relatively lower melting points and boiling points.
300
How is the strength of a covalent bond related to its bond dissociation energy?
What is A large bond dissociation energy corresponds to a strong covalent bond.
300
Orbitals in this type of bonding overlap less than sigma bonds and therefore tend to be weaker.
What is pi bonds
300
The more electronegative atom attracts electrons more strongly and gains a slightly ________ charge. The less electronegative atom has a slightly _______ charge.
What is negative, positive.
400
Define all of the following to receive full credit (100 points per definition). Covalent Bond, Diatomic Molecule, Molecular Compound, Molecular Formula
What is: Covalent Bond: Atoms held together by sharing electrons Diatomic Molecule: A molecule consisting of two atoms Molecular Compound: A compound composed of molecules (a neutral group of atoms that are covalently bonded) Molecular Formula: The chemical formula of a molecular compound.
400
What kinds of information does a structural formula reveal about the compound it represents?
What is The arrangement of atoms in a molecule.
400
What does VSEPR Theory state?
What is According to VSEPR theory, the repulsion between electron pairs causes molecular shapes to adjust so that the valence-electron pairs stay as far apart as possible.
400
Intermolecular attractions are _______ than either ionic or covalent bonds.
What is weaker
500
Describe how the molecule whose formula is NO is different from the molecule whose formula is N2O
What is: NO has 1 N atom and 1 O atom; N2O has 2 N atoms and 1 O atom
500
What are the ways in which the octet rule can sometimes fail to be obeyed.
What is The octet rule cannot be satisfied in molecules whose total number of valence electrons is an odd number. There are also molecules in which an atom has fewer, or more, than a complete octet of valence electrons.
500
What is the molecular shape of CO2?
What is linear triatomic (180 degree bond angle)
500
How does a network solid differ from most other covalent compounds?
What is The atoms in a network solid are covalently bonded in a large array (or crystal), which can be thought of as a single molecule.