Which of the following has the greatest metallic character?
Correct answer: A. Na
- A. Na
- B. Mg
- C. Al
- D. Si
Explanation
The metallic character of an element is determined by its ability to lose electrons easily. In the periodic table, metallic character increases as you move down a group and decreases across a period from left to right. Sodium (Na) is the first element in Period 3, making it the most metallic among the given options. In contrast, magnesium (Mg) is slightly less metallic, aluminum (Al) even less so, and silicon (Si) is a metalloid with a predominantly non-metallic character.
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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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