Atomic volumes of C, N, O and F are in the order
Correct answer: B. C > N > O > F
- A. C > N > F > O
- B. C > N > O > F
- C. F > O > N > C
- D. N > C > O > F
Explanation
As you move across a period from left to right in the periodic table, atomic volumes generally decrease due to the increasing nuclear charge, which pulls the electrons closer to the nucleus, reducing the volume. Therefore, the correct order of atomic volumes for C, N, O, and F is C > N > O > F. Option B correctly reflects this trend. Option A incorrectly places fluorine before oxygen. Option C reverses the trend, suggesting fluorine is larger than carbon. Option D incorrectly suggests nitrogen is larger than carbon and disrupts the overall sequence.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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