Part A. Use the PhET to complete the sentences describing how electronegativity is related to bond dipole experienced by the molecule.
Match the words to the appropriate blanks in the sentences below. Make certain each sentence is complete before submitting your answer.
Electronegativity is a term used to define an atom’s ability to attract electrons to itself when it is bonded to another atom. A larger electronegativity value indicates a greater ability for an atom to attract electrons to itself. Electronegativity values follow trends (with exceptions) across the periodic table. They increase from left to right across a period and increase from the bottom of a group to the top. Thus, fluorine is the most electronegative element with a value of 4.0. Notice that since the noble gases have completely filled electron shells and are inert, they don’t have assigned electronegativity values.
In any given molecule comprised of two or more nonidentical atoms, the electrons contained in the bond are not shared equally. Bond polarity is a measure of how unevenly the electrons in a bond are shared and is indicated by the difference between the electronegativities of the atoms involved. A large difference in electronegativities indicates that a bond is polar and contains a dipole (i.e., the bond character is more ionic), which is created when two equal but opposite charges are separated. A smaller difference in electronegativity makes the bond character more covalent.
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