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EXAM 2, EXAM 3 & LAB PRACTICUM: CHEM120 /
CHEM 120 (LATEST UPDATES STUDY
BUNDLE PACKAGE WITH SOLUTIONS) INTRO TO
GENERAL, ORGANIC & BIOLOGICAL CHEMISTRY WITH
LAB | QUESTIONS AND ANSWERS | GRADE A | 100%
CORRECT (VERIFIED ANSWERS) - CHAMBERLAIN
What is electronegativity? What are the periodic trends in
electronegativity? .....ANSWER.....Electronegativity is the ability
of an atom to attract electrons to itself in a chemical bond. This
results in a polar bond. Electronegativity generally increases
across the period in the periodic table. And electronegativity
generally decreases down a column in the periodic table. The
most electronegative element is fluorine.
Explain the different between a pure covalent bond, a polar
covalent bond, and an ionic bond. .....ANSWER.....If two elements
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with identical electronegativity form a covalent bond, they share
electrons equally, and the bond is purely covalent or non-polar.
If there is an intermediate electronegativity the difference
between the two elements, such as between two different
nonmetals, the bond is polar covalent
If there is a large electronegativity difference between the two
elements in a bind, such as normally occurs between a metal and
a nonmetal, the electron from the metal is almost completely
transferred to the nonmetal, and the bond is ionic.
What is a dipole moment? .....ANSWER.....A dipole moment
occurs anytime there is a separation of positive and negative
charges. It is used to quantify the polarity of a bond. The
magnitude of the dipole moment created by separating two
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particles of equal but opposite charges of magnitude by a
distance is given by u=qr
What is the basic procedure for writing a covalent Lewis
structure? .....ANSWER.....The steps involved in writing a lewis
structure are as follows:
1. Write the correct skeletal structure for the molecule.
2. Calculate the total number of electrons for the Lewis structure
by summing the valence electrons of each atom in the molecule.
3. Distribute the electrons among the atoms, giving octets (or
duets for hydrogen) to as many of them as possible.
4. If any atoms lack an octet, form double or triple bonds as
necessary to give them octets
How do you determine the number of electrons that go into the
Lewis structure of a molecule? A polyatomic ion?
.....ANSWER.....The total number of electrons for Louis structure of
EXAM 2, EXAM 3 & LAB PRACTICUM: CHEM120 /
CHEM 120 (LATEST UPDATES STUDY
BUNDLE PACKAGE WITH SOLUTIONS) INTRO TO
GENERAL, ORGANIC & BIOLOGICAL CHEMISTRY WITH
LAB | QUESTIONS AND ANSWERS | GRADE A | 100%
CORRECT (VERIFIED ANSWERS) - CHAMBERLAIN
What is electronegativity? What are the periodic trends in
electronegativity? .....ANSWER.....Electronegativity is the ability
of an atom to attract electrons to itself in a chemical bond. This
results in a polar bond. Electronegativity generally increases
across the period in the periodic table. And electronegativity
generally decreases down a column in the periodic table. The
most electronegative element is fluorine.
Explain the different between a pure covalent bond, a polar
covalent bond, and an ionic bond. .....ANSWER.....If two elements
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with identical electronegativity form a covalent bond, they share
electrons equally, and the bond is purely covalent or non-polar.
If there is an intermediate electronegativity the difference
between the two elements, such as between two different
nonmetals, the bond is polar covalent
If there is a large electronegativity difference between the two
elements in a bind, such as normally occurs between a metal and
a nonmetal, the electron from the metal is almost completely
transferred to the nonmetal, and the bond is ionic.
What is a dipole moment? .....ANSWER.....A dipole moment
occurs anytime there is a separation of positive and negative
charges. It is used to quantify the polarity of a bond. The
magnitude of the dipole moment created by separating two
, Page 3 of 23
particles of equal but opposite charges of magnitude by a
distance is given by u=qr
What is the basic procedure for writing a covalent Lewis
structure? .....ANSWER.....The steps involved in writing a lewis
structure are as follows:
1. Write the correct skeletal structure for the molecule.
2. Calculate the total number of electrons for the Lewis structure
by summing the valence electrons of each atom in the molecule.
3. Distribute the electrons among the atoms, giving octets (or
duets for hydrogen) to as many of them as possible.
4. If any atoms lack an octet, form double or triple bonds as
necessary to give them octets
How do you determine the number of electrons that go into the
Lewis structure of a molecule? A polyatomic ion?
.....ANSWER.....The total number of electrons for Louis structure of
