Potassium has a relatively low electronegativity of 0.8. if potassium forms a compound with a group 17 element, where is the electron most likely to be located within that compound

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21-11-2017
Chemistry

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Potassium has a relatively low electronegativity of 0.8. if potassium forms a compound with a group 17 element, where is the electron most likely to be located within that compound

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meerkat18 meerkat18 · Answer 1 · 2017-12-01T17:17:41+01:00

Take a look at the periodic table shown in the attached picture. Group 17 elements are enclosed in a red box as shown. Now, let us find the electronegativities of those elements.

F: 3.98
Cl: 3.16
Br: 2.96
I: 2.66
At: 2.2

Find the difference of the electronegativities. The one with the greatest difference is the answer.

With F: 3.98-0.8 = 3.18
With Cl: 3.16-0.8 = 2.38
With Br: 2.96-0.8 = 2.16
With I: 2.66-0.8 = 1.88
With At: 2.2-0.8 = 1.4

Thus, the answer is with F. The compound would be KF.