Multiple Choice
Which of the following must occur for a covalent bond to form between two atoms?
11. Bonding & Molecular Structure
Chemical Bonds
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Which of these pairs of atoms is most likely to form a nonpolar covalent bond?
A
N and H
B
Na and Cl
C
H and H
D
C and O
Verified step by step guidance1
Understand the concept of covalent bonds: Covalent bonds involve the sharing of electrons between atoms. Nonpolar covalent bonds occur when the electrons are shared equally between two atoms.
Consider electronegativity: Electronegativity is a measure of an atom's ability to attract and hold onto electrons. In a nonpolar covalent bond, the atoms involved have similar electronegativities.
Analyze the given pairs: Look at the electronegativity values of the atoms in each pair. Atoms with similar electronegativities are more likely to form nonpolar covalent bonds.
Evaluate the pair H and H: Hydrogen atoms have the same electronegativity, meaning they share electrons equally, forming a nonpolar covalent bond.
Compare with other pairs: N and H have different electronegativities, leading to a polar covalent bond. Na and Cl form an ionic bond due to large electronegativity difference. C and O have different electronegativities, leading to a polar covalent bond.
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