The element with atomic number 9 is closest in chemical properties with element of atomic-number:
Correct answer: C. 17
- A. 27
- B. 11
- C. 17
- D. 8
Explanation
As they belong to the same group, group 7A, they have the same chemical properties. Atomic number 9 is for fluorine, and atomic number 17 is for chlorine.
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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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