Name: ____________ANSWER KEY______________________________ Date: ______________________________ Period: _______
Polarity: Polar bears and Penguins – Comic
Strip Activity


What do the penguin and the polar bear represent in the cartoon?
Penguin = metal, cation, low electronegativity
Polar bear = nonmetal, anion, high electronegativity
Draw the Lewis dot structure for HCl

What do the penguins represent in the cartoon? Hydrogen What does the
polar bear represent in the cartoon? Chlorine

What do you think the size difference between these animals means? More/less electronegative

Use your own words to define electronegativity as you understand it? Ability of an atom to attract/steal and
electron - an atom’s desire to get electrons
What is the trend of electronegativity according to the picture above? Nonmetals have higher electronegativity
than metals
Why does the penguin
think that polarity is
unfair?
Even though they’re
“sharing” the electrons,
he has lower
electronegativity so he
doesn’t pull on them as
strong.

Explain what you think this crossed arrow above a bond could represent:
Dipole moment (head of the arrow points to the atom with the higher electronegativity)
Making Sense:
 What does electronegativity have to do with polarity? Polarity is the unequal sharing of electrons. Atoms with
higher electronegativity pull on the electrons more.
Electro Negativity: Use the Diagram Below
 What happens to the electronegativity values across each period from left to right? Increases

What happens to the electronegativity values up each groups from bottom to top? Increases

What type of atoms have the lowest electronegativity? (metals, nonmetals, or metalloids) CIRCLE ONE.
What makes something an Ionic bond vs Covalent bond?
If the difference between electronegativity is greater than 2.1 the bond is ionic.
If the difference between electronegativity is less than.5 the bond is non polar covalent.
If the difference between electronegativity is between .5 and 2.1 the bond is polar covalent.

Using the table above, list 3 examples of pairs of atoms that would make ionic bonds
K + Cl = 3.16 – 0.82 = 2.34
Ca + Cl = 3.16 – 1.00 = 2.16
Cr + F = 3.98 – 1.66 = 2.32

List 3 examples of pairs of atoms with polar covalent bonds
P + Cl = 3.16 – 2.19 = 1.41
Ca + N = 3.04 – 1.00 = 2.04
Ba + I = 2.66 – 0.89 = 1.77