Which of the following sets of elements does not belong to same group?
Correct answer: A. C, Si, Ga, Sn
- A. C, Si, Ga, Sn
- B. Cl, Br, I, At
- C. N, P, As, Sb
- D. He, Ne, Ar, Kr.
Explanation
The correct answer is Option A: C, Si, Ga, Sn. In the Periodic Table, elements in the same group share similar properties. Carbon (C) and Silicon (Si) are members of Group 14, whereas Gallium (Ga) is in Group 13 and Tin (Sn) is also in Group 14. Thus, they do not all belong to the same group.Option B: Cl, Br, I, At are all halogens in Group 17, Option C: N, P, As, Sb are all pnictogens in Group 15, and Option D: He, Ne, Ar, Kr are all noble gases in Group 18. These options consist of elements that all belong to the same group.
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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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