Podcast Beta
Questions and Answers
What is electronegativity?
Which element has the least electronegativity according to Pauling's scale?
What does the large electronegativity value for fluorine predict?
Which compounds are created by bonding involving a sharing or transfer of electrons between atoms?
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What type of bonds are formed when electrons are shared between atoms?
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What are the electronegativities of the 'BIG 6' elements?
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Why do long chain fatty acids found in oils and fats not mix with the watery environment of the cell?
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What type of bond joins amino acids together in proteins?
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Why are drugs with N-H or O-H bonds very soluble and effective?
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What do the electronegativity differences between carbon and nitrogen, and between nitrogen and hydrogen, make the amide group?
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What electronegativity difference range indicates nonpolar bonds?
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What causes changes in electronegativity?
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What happens to electronegativity values as you move down a group?
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What is the electronegativity value of noble gases?
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What do electronegativity values greater than 104 indicate?
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Study Notes
Covalent Bonding and Electronegativity
- Covalent bonds can be nonpolar or polar depending on how electrons are shared
- Electronegativity difference (ΔEN) quantitatively determines bond polarity
- Table 1 shows electronegativity values and ΔEN calculations for different covalent bonds
- Electronegativity difference of 0 to less than 0.5 indicates nonpolar bonds, while greater than 0.5 to ~1.7 indicates polar bonds
- Electronegativity trends are visible on the periodic table and in corresponding graphs
- Nonmetals on the right have higher electronegativities than metals on the left
- Electronegativity values increase across a period and decrease down a group
- Changes in electronegativity can be explained by considering nuclear charge, electron distribution, and nuclear shielding
- As the number of electron shells increases, the degree of nuclear shielding also increases
- Moving down a group results in the gain of electrons occupying energy shells farther away from the nucleus
- Noble gases have electronegativity values of 0.0 due to full outer electron shells
- Elements with atomic numbers greater than 104 have electronegativity values of 0.0 due to their radioactive nature
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Description
Test your knowledge of covalent bonding and electronegativity with this quiz. Explore the concept of bond polarity, electronegativity trends, and factors influencing electronegativity. Sharpen your understanding of how electronegativity affects covalent bonds with this informative quiz.
