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In which of the following systems will the radius of the first orbit `(n = 1)` be minimum ?A. doubly ionized lithiumB. singly ionized heliumC. deuterium atomD. hydrogen atom |
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Answer» Correct Answer - A Radius of first orbit , `r prop(1)/(Z)`, For doubly ionized lithium, `Z(=3)` will be maximum, hence for doubly ioized lithium, r will be minimum. |
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