Covalent character of hydrides decrease _?
Correct answer: A. Down the Group
- A. Down the Group
- B. Across the Period
- C. Along the d-block
- D. All of these
Explanation
The covalent character 'decreases in groups' as we go from top to bottom. Example in group 2, the hydrides of beryllium and magnesium are covalent, whereas the hydrides of strontium, calcium and barium are ionic. The covalent character decreases down the group as the electrons get further away from the nucleus. The attractive forces between the positive charge of the nucleus and negative charge of the electrons 'decrease' and it is easier to lose electron to hydrogen.
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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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