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प्रश्न
In group 2, beryllium and calcium elements, calcium is more electropositive element than beryllium.
उत्तर
- Electronic configuration of beryllium is (2, 2).
Electronic configuration of calcium is (2, 8, 8, 2). - Among beryllium and calcium elements, calcium has the least effective nuclear charge exerting attractive force on valence electrons.
- This is because of the electrons in the inner shells, which lie in between the valence shell and the nucleus.
- These electrons act as a shield reducing the attractive force of the nucleus on the valence electrons. Therefore, calcium can lose its valence electrons more readily than beryllium.
Hence, in group 2, calcium is a more electropositive element than beryllium.
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