Electronegativity Scale

After learning about the concepts of electronegativity and polarity in yesterday’s lesson, students learned how scientist Linus Pauling assigned electronegativity values to individual atoms as a measure of how strongly an atom attracts electrons.

The Lesson 44 PowerPoint includes a copy of the periodic table with electronegativity values for each element.  It also explains the difference in electronegativity between covalent bonds (0.5 and less), polar covalent bonds (between 0.5-2.1), and ionic bonds (greater than 2.1).  The Lesson 44 Worksheet provides students with the opportunity to calculate the electronegativity difference between two atoms in a molecule and to use that information to determine the type of bond that is present between the two atoms.  For homework, students are assigned questions 1-5 (odds).

Students were curious about new elements in the periodic table, so below is an article for the curious to learn more about the predicted “Island of Stability” and the theoretical upper limit in atomic number for the periodic table:

Beyond element 118: the next row of the periodic table