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a covalent bond in which the shared electron pair comes from only one of the atoms
coordinate covalent bond
a type of intermolecular force that is very important in determining the properties of water and of important biological molecules such as proteins and DNA
According to VSEPR theory, molecules adjust their shapes to keep which of the following as far apart as possible?
pairs of valence electrons
How do atoms achieve noble-gas electron configurations in single covalent bonds?
Two atoms share two electrons
How is a pair of molecular orbitals formed?
By the overlap of two atomic orbitals from different atoms
How many valid electron dot formulas—having the same number of electron pairs for a molecule or ion—can be written when a resonance structure occurs?
Once formed, how are coordinate covalent bonds different from other covalent bonds?
There is no difference.
What causes hydrogen bonding?
bonding of a covalently bonded hydrogen atom with an unshared electron pair
What causes water molecules to have a bent shape, according to VSEPR theory?
repulsive forces between unshared pairs of electrons
What is shown by the structural formula of a molecule or polyatomic ion?
the arrangement of bonded atoms
When one atom contributes both bonding electrons in a single covalent bond, the bond is called a/an _______________________.
coordinate covalent bond
When placed between oppositely charged metal plates, the region of a water molecule attracted to the negative plate is the ____.
hydrogen region of the molecule
Where are the electrons most probably located in a molecular bonding orbital?
between the two atomic nuclei
Which elements can form diatomic molecules joined by a single covalent bond?
hydrogen and the halogens only
Which noble gas has the same electron configuration as the oxygen atom in a water molecule (once it is sharing electrons with the two hydrogen atoms)?
Which of the following atoms acquires the most negative charge in a covalent bond with hydrogen?
What electron configuration gives the correct arrangement of the four valence electrons of the carbon atom in the molecule methane (CH⁴)?
Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules?
Why is hydrogen bonding only possible with hydrogen?
Hydrogen is the only reactive element that does not have "non-valence" or "inner core" electrons shielding its nucleus.
How many covalent bonds are in a covalently bonded molecule containing 1 phosphorus atom and 3 chlorine atoms?
How many electrons does a nitrogen atom need to gain in order to attain a noble-gas electron configuration?
How many electrons does carbon need to gain in order to obtain a noble-gas electron configuration?
What is the total number of covalent bonds normally associated with a single carbon atom in a compound?
If d+ were written next to an atom in a structural formula, it means...
the atom has a partial positive charge
Predict the type of attraction that occurs when potassium joins with chlorine to form the compound KCI.
What type(s) of intermolecular force(s) are present in a methane molecule (CH4)?
Rank the four types of solids in terms of the realative strength of the attractions between particles (weakest → strongest).
Molecular < Metallic < Ionic < Covalent-network
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