Lesson Worksheet: Electronegativity Chemistry

In this worksheet, we will practice explaining the chemical property of electronegativity.


Study the following diagram.

Knowing that the electronegativities of two bonded elements are 2.04 and 3.16, what is the type of bond between them?

  • AA pure covalent bond
  • BA polar covalent bond
  • CAn ionic bond
  • DA non-polar covalent bond


Which group 2 element is likely to have a similar electronegativity to aluminum?

  • ABeryllium
  • BCalcium
  • CStrontium
  • DBarium
  • EMagnesium


Why is the element nitrogen more electronegative than the element beryllium?

  • ANitrogen has a greater number of protons and hence an effective nuclear charge that more strongly attracts the bonding electrons.
  • BBeryllium is a metal, and metals have higher values of electronegativity than nonmetals of the same period.
  • CNitrogen has a greater number of electrons in a similar volume, resulting in greater electronegativity.
  • DElectronegativity increases as you ascend the groups of the periodic table.
  • EThe bonding pair of electrons are closer to the nucleus in beryllium than in nitrogen.


Why is the element potassium less electronegative than the element lithium?

  • AElectronegativity increases as you descend a group in the periodic table.
  • BPotassium does not follow the general trend of electronegativity.
  • CThe bonding electrons are further from the nucleus in an atom of potassium, and so experiences less attraction.
  • DPotassium has a greater number of protons and a greater nuclear charge to attract the bonding electrons.
  • ELithium has less electrons than potassium.


The difference in electronegativity between two atoms of different elements is 0.2, using values from the Pauling scale. What type of bond is likely to form between these two atoms in a chemical reaction?

  • AA nonpolar covalent bond
  • BA polar bond
  • CAn ionic bond


Which of the following comparisons of silicon is not correct?

  • ASilicon is more electronegative than cesium.
  • BSilicon is less electronegative than chlorine.
  • CSilicon is less electronegative than carbon.
  • DSilicon is more electronegative than sodium.
  • ESilicon is more electronegative than oxygen.


Which of the following elements has the lowest value of electronegativity according to the Pauling scale?

  • AMg
  • BS
  • CSi
  • DAl
  • ECl


Why do no values exist on the Pauling scale of electronegativity for argon, neon, and helium?

  • AThese noble gases have too great an electron density.
  • BThese noble gases are synthetic elements and do not exist in quantities that are large enough to be measured.
  • CThese noble gases require too much energy to be ionized.
  • DThese noble gases do not form bonds; therefore, no bond dissociation energy data is available.
  • EThese noble gases exist as electrically neutral atoms.


By considering the Pauling scale, used to quantify electronegativity, which of the following elements is the least electronegative?

  • ACs
  • BNa
  • CRb
  • DK
  • ELi


Which letter corresponds to the elements in the periodic table that are the most electronegative?

  • AC
  • BB
  • CD
  • DA

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