Multiple Choice
Which of the following is not an example of a covalent bond?
11. Bonding & Molecular Structure
Chemical Bonds
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Which of the following best describes a polar covalent bond?
A
A bond where electrons are shared equally between atoms of the same element.
B
A bond where electrons are shared unequally between two atoms.
C
A bond where electrons are transferred from one atom to another.
D
A bond where electrons are shared equally between two atoms.
Verified step by step guidance1
Understand the concept of a covalent bond: A covalent bond is formed when two atoms share electrons. This sharing allows each atom to attain the electron configuration of a noble gas, achieving stability.
Differentiate between polar and nonpolar covalent bonds: In a nonpolar covalent bond, electrons are shared equally between the two atoms, usually because the atoms have similar electronegativities.
Define electronegativity: Electronegativity is the ability of an atom to attract shared electrons in a chemical bond. When two atoms have different electronegativities, the shared electrons are more attracted to the atom with the higher electronegativity.
Identify a polar covalent bond: A polar covalent bond occurs when electrons are shared unequally between two atoms due to a difference in electronegativity. This results in a partial positive charge on one atom and a partial negative charge on the other.
Apply the concept to the given options: The correct description of a polar covalent bond is 'A bond where electrons are shared unequally between two atoms,' as this reflects the unequal sharing due to differences in electronegativity.
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