교과서 질문
Which of these molecules would you predict to have the largest number of polar covalent bonds based on their molecular formulas?
a. C2H6O(ethanol)
b. C2H6(ethane)
c. C2H4O2(aceticacid)
d. C3H8O (propanol)
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2. Cell Chemistry & Cell Components
Covalent Bonds
3:02 minutesProblem 11
교과서 질문
In terms of electron sharing between atoms, compare nonpolar covalent bonds, polar covalent bonds, and ions.
검증된 단계별 안내1
Step 1: Define nonpolar covalent bonds. These are bonds where electrons are shared equally between two atoms because they have similar electronegativities.
Step 2: Define polar covalent bonds. These are bonds where electrons are shared unequally between two atoms due to a difference in electronegativity, resulting in a partial positive charge on one atom and a partial negative charge on the other.
Step 3: Define ions. Ions are atoms or molecules that have gained or lost one or more electrons, resulting in a net positive or negative charge.
Step 4: Compare nonpolar covalent bonds and polar covalent bonds. In nonpolar covalent bonds, the electron distribution is equal, whereas in polar covalent bonds, the electron distribution is unequal.
Step 5: Compare covalent bonds and ions. Covalent bonds involve the sharing of electrons between atoms, while ions result from the complete transfer of electrons from one atom to another, leading to charged particles.
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TextbookSolutions.keyConceptsSubtitle
Nonpolar Covalent Bonds
Nonpolar covalent bonds occur when two atoms share electrons equally due to similar electronegativities. This equal sharing results in a balanced distribution of electrical charge, meaning there is no significant dipole moment. Common examples include diatomic molecules like O2 and N2, where the atoms are identical, leading to uniform electron sharing.
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Nonpolar Covalent Bonds
Polar Covalent Bonds
Polar covalent bonds form when two atoms with different electronegativities share electrons unequally. The atom with higher electronegativity attracts the shared electrons more strongly, creating a partial negative charge on that atom and a partial positive charge on the other. Water (H2O) is a classic example, where the oxygen atom pulls the shared electrons closer, resulting in a polar molecule.
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Ionic Bonds
Ionic bonds arise when one atom donates an electron to another, resulting in the formation of charged ions. The atom that loses an electron becomes a positively charged cation, while the atom that gains an electron becomes a negatively charged anion. The electrostatic attraction between these oppositely charged ions creates a strong bond, as seen in compounds like sodium chloride (NaCl).
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