Which of the elements do not fall in stair case of the modern periodic table__________________?
Correct answer: D. None of the above
- A. Si
- B. As
- C. Te
- D. None of the above
Explanation
Silicon, arsenic and tellurium all lie on or form part of the staircase boundary between metals and non-metals in the modern periodic table. Since every named element is on the staircase, none of the listed elements is an exception. The likely mistake is choosing silicon because it is sometimes described simply as a metalloid rather than being recognised as a staircase 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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