Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises for a two-atom molecule: (a) Adjust the electronegativity value so the bond dipole is pointing toward B. Then determine what the electronegativity values must be to switch the dipole so that it points toward A. (b) With a partial positive charge on A, turn on the electric field and describe what happens. (c) With a small partial negative charge on A, turn on the electric field and describe what happens. (d) Reset all, and then with a large partial negative charge on A, turn on the electric field and describe what happens.
Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises for a two-atom molecule: (a) Adjust the electronegativity value so the bond dipole is pointing toward B. Then determine what the electronegativity values must be to switch the dipole so that it points toward A. (b) With a partial positive charge on A, turn on the electric field and describe what happens. (c) With a small partial negative charge on A, turn on the electric field and describe what happens. (d) Reset all, and then with a large partial negative charge on A, turn on the electric field and describe what happens.
Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises for a two-atom molecule:
(a) Adjust the electronegativity value so the bond dipole is pointing toward B. Then determine what the electronegativity values must be to switch the dipole so that it points toward A.
(b) With a partial positive charge on A, turn on the electric field and describe what happens.
(c) With a small partial negative charge on A, turn on the electric field and describe what happens.
(d) Reset all, and then with a large partial negative charge on A, turn on the electric field and describe what happens.
ii.
Answer true or false.
(a) A covalent bond is formed between two atoms whose difference in electronegativity is less
than 1.9.
(b) If the difference in electronegativity between two atoms is zero (they have identical
electronegativities), then the two atoms will not form a covalent bond.
(c) A covalent bond formed by sharing two electrons is called a double bond.
(d) In the hydrogen molecule (H2), the shared pair of electrons completes the valence shell of
each hydrogen.
(e) In the molecule CH4, each hydrogen has an electron configuration like that of helium, and
carbon has an electron configuration like that of neon.
(f) In a polar covalent bond, the more electronegative atom has a partial negative charge (8-)
and the less electronegative atom has a partial positive charge (&+).
(g) These bonds are arranged in order of increasing polarity C-H
1.- Answer the following questions:
(a) What is electronegativity?
(b) How is electronegativity measured numerically? Name the scale used and the range of values in the scale.
(c) Explain how electronegativity differences between atoms result in nonpolar covalent bonds and polar covalent bonds. Make sure you explain the difference between nonpolar covalent and polar covalent bonds as it relates to the electronegativity of the participating atoms.
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