In which of the following pairs are elements belonging to the same group?
Correct answer: B. Nitrogen & Phosphorous
- A. Boron & Beryllium
- B. Nitrogen & Phosphorous
- C. Magnesium & Aluminium
Explanation
Elements within the same group (vertical column) in the periodic table share similar chemical properties due to having the same number of valence electrons. Nitrogen (N) and phosphorus (P) belong to Group 15 (VA), hence they share the same group and exhibit similar chemical behavior.
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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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