Homework Answers
1)
Step 1: Find out electronegativity of both elements
Step 2: Find out the difference in electronegativity
Step 3: Use the following table to determine the character of bond. Note that the values in the below table are approximate values and not exact. This is because there is no well defined criteria that when does a polar covalent bond transitions to an ionic one and hence, different people use different table.
| Electronegativity difference | Bond Character |
| Greater than 1.7 | Ionic |
| Lesser than 1.7 but greater than 0.4 | Polar Covalent |
| Lesser than 0.4 | Non-polar Covalent |
a)
Electronegativity of K = 0.82
Electronegativity of Cl = 3.16
Difference = 3.16 - 0.82 = 2.34
Thus, this is an ionic bond
b)
Electronegativity of N = 3.04
Electronegativity of N = 3.04
Difference = 3.04-3.04 = 0
Thus, this is a non-polar covalent bond
c)
Electronegativity of C = 2.55
Electronegativity of S= 2.58
Difference = 2.58-2.55 = 0.03
Thus, this is a non-polar covalent bond
d)
Electronegativity of C = 2.55
Electronegativity of Cl = 3.16
Difference = 3.16-2.55 = 0.61
Thus, this is a polar covalent bond
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bond in which electrons are shared between atoms of elements. A
covalent bond can be polar or nonpolar. In a nonpolar covalent
bond, the bond is between two identical atoms and the electrons are
evenly shared between the atoms.In contrast, in a
polar covalent bond, the bond is between two nonidentical atoms and
the electrons are unevenly shared between the atoms. The uneven
sharing of electrons takes place because of the difference in the
electronegativity...
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values leads to ionic bonding?
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ΔEN and average EN values leads to non polar
covalent bonding?
3) Based on the data in table 1, what combination of
ΔEN and average EN values leads to polar...
Consider the following element combinations. Classify the bonds formed between each pair as ionic, polar covalent,...
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In a covalent bond between two atoms, the more electronegative atom will attract more electron density toward itself, producing a polar bond. The more electronegative element will carry a partial negative charge, whereas the less electronegative element will carry a partial positive charge. The direction of the bond dipole is always toward the more electronegative element. This is often indicated by an arrow, as shown in the figure. The magnitude of the bond polarity can be estimated by using the...
A covalent bond is a
bond in which electrons are shared between atoms of elements. A
covalent bond can be polar or nonpolar. In a nonpolar covalent
bond, the bond is between two identical atoms and the electrons are
evenly shared between the atoms.In contrast, in a
polar covalent bond, the bond is between two nonidentical atoms and
the electrons are unevenly shared between the atoms. The uneven
sharing of electrons takes place because of the difference in the
electronegativity...
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1) Determne the average electronegativity between EN1 and EN2
for each bond in the table above. Based on the data on table 1,
what combination of ΔEN given and average EN
values leads to ionic bonding?
2) Based on the data in table 1, what combination of
ΔEN and average EN values leads to non polar
covalent bonding?
3) Based on the data in table 1, what combination of
ΔEN and average EN values leads to polar...
Consider the following element combinations. Classify the bonds formed between each pair as ionic, polar covalent, or nonpolar covalent qualitatively based solely on each element's position on the periodic table. Do not conduct calculations.
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