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Atoms and Nuclei question

2003 · Q149
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Atoms and Nuclei question

2003 · Q149

NEETPhysicsAtoms and NucleiMCQ+4 / −1
In which of the following systems will the radius of the first orbit (n = 1) be minimum ?
  1. A
    doubly ionized lithium
  2. B
    singly ionized helium
  3. C
    deuterium atom
  4. D
    hydrogen atom
View written solutionFree

Correct answer: A

As Radius of first orbit, r ∝\propto∝ 1Z{1 \over Z}Z1​

for doubly ionized lithium Z (= 3) will be maximum, hence for doubly ionized lithium, r will be minimum.

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