Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?
Correct answer: D. Its number of isotopes
- A. The nature of its oxides
- B. The charge on its ions
- C. The formula of its oxide
- D. Its number of isotopes
Explanation
The periodic-table position can help predict oxide character, common ionic charge, and often oxide formula from valence electrons, but it cannot determine how many isotopes an element has. The likely mistake is choosing oxide formula, although periodic valency often allows that formula to be predicted.
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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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