Polarity of Bonds Worksheet
Grade 12 Chemistry worksheet on understanding and identifying the polarity of chemical bonds, including electronegativity differences and molecular geometry.
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Polarity of Bonds Worksheet
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Read each question carefully and provide your best answer based on your understanding of chemical bond polarity. Use the provided electronegativity values when necessary: H=2.20, C=2.55, N=3.04, O=3.44, F=3.98, Cl=3.16, Br=2.96, I=2.66, S=2.58, P=2.19, Na=0.93, K=0.82.
1. Which of the following best describes a nonpolar covalent bond?
Electrons are completely transferred from one atom to another.
Electrons are shared equally between two atoms.
Electrons are shared unequally between two atoms, creating partial charges.
Atoms are held together by electrostatic forces between ions.
2. Based on electronegativity differences, which bond is the most polar?
C-H
O-H
N-H
Cl-Cl
3. The ability of an atom to attract electrons in a chemical bond is called .
4. A bond with an electronegativity difference between 0.5 and 1.9 is generally considered a covalent bond.
5. Explain why carbon dioxide (CO2) is a nonpolar molecule, even though it contains polar C-O bonds. Use the concept of molecular geometry in your explanation.
6. Determine if the bond in HBr is polar or nonpolar. Justify your answer by calculating the electronegativity difference and explaining how it relates to bond polarity.
7. All bonds between different elements are polar.
True
False
8. A molecule with polar bonds must always be a polar molecule.
True
False
9. Consider the molecule CCl4 (carbon tetrachloride). Is this molecule polar or nonpolar? Explain your reasoning, including an analysis of bond polarity and molecular geometry.