Which of the following element is most electropositive?
Correct answer: A. Li
- A. Li
- B. Be
- C. B
- D. C
Explanation
The electropositivity of an element is related to its ability to donate electrons and form positive ions. In the periodic table, electropositivity increases down a group and decreases across a period. Lithium (Li), being an alkali metal in Group 1, is the most electropositive among the options provided. This is because Group 1 elements have a single electron in their outermost shell, which they readily lose to achieve a stable electron configuration, making them highly electropositive.In contrast, Beryllium (Be), Boron (B), and Carbon (C) are less electropositive. Be is in Group 2 and has a higher ionization energy than Li, making it less willing to lose electrons. B is a metalloid and C is a non-metal, both of which are less electropositive than alkali metals like Li.
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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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