Which of the following represents the electronic configuration of the most electropositive element?
Correct answer: B. [Xe] 6s1
- A. [He] 2s1
- B. [Xe] 6s1
- C. [He] 2s2
- D. [Xe] 6s2
Explanation
Electropositivity is the tendency of an atom to lose electrons, and it increases down a group. The configuration [Xe] 6s¹ corresponds to Cesium (Cs), which is an alkali metal in the 6th period. It is the most electropositive stable element.
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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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