Which of the following will not form a crystalline structure with oppositely charged ions?
Correct answer: B. H-
- A. H+
- B. H-
- C. Mg2
- D. Ca2+
Explanation
H- (hydride ion) is a very small and highly mobile ion. Due to its small size and high mobility, it often forms covalent bonds with other atoms instead of forming ionic crystals with a regular arrangement of oppositely charged ions.
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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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