Identify among the following elements that does NOT belong to VIIA group
Correct answer: C. N
- A. Cl
- B. F
- C. N
- D. Br
Explanation
Group VIIA, or group 17, contains the halogens fluorine, chlorine and bromine. Nitrogen belongs to group VA, or group 15, so it does not belong to VIIA. The likely mistake is choosing another element because students may confuse group numbers with period numbers.
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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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