An element of atomic mass 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statement regarding this element is NOT correct?
Correct answer: D. It forms an acidic oxide.
- A. It forms an basic oxide.
- B. It belongs to II A group.
- C. It belongs to IV period.
- D. It forms an acidic oxide.
Explanation
The element is calcium and hence its oxide (CaO) is basic in nature. So option D is correct.
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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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