Which of the following ions does not have the electronic configuration same as that of neon?
Correct answer: D. Ca2+
- A. F-
- B. O2-
- C. Na+
- D. Ca2+
Explanation
Neon has an atomic number of 10, meaning it has 10 electrons. The ions F-, O2-, and Na+ all have electron configurations of 10 electrons, which match that of neon's. However, Ca2+ has 18 electrons after losing 2 electrons, resulting in an electronic configuration that is different from neon. Therefore, Ca2+ does not have the same electron configuration as neon.
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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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