The most reactive allotropic form of phosphorus is________________?
Correct answer: A. White
- A. White
- B. Redox potential
- C. Black
- D. Violet
Explanation
White phosphorus exists as discrete P4 molecules with considerable ring strain, making it chemically more reactive than the polymeric red, violet and black forms. It is also stored under water because it can ignite in air. “Redox potential” is not an allotrope, so selecting it results from treating a chemical property as a form of phosphorus.
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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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