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PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2003

PhysicsEasysingle choice

In which of the following systems will the radius of the first orbit $(n = 1)$ be minimum?NEET 2003

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Answer:

Solution:

Radius of the first orbit of an atom $R_{1} = \frac{0.529}{Z} A^{\circ}$ $\Rightarrow R_{1} \propto \frac{1}{Z}$ where $Z$ is the atomic number of Hydrogen-like atom. Since $Z$ is maximum for doubly ionized lithium, thus radius of first orbit is minimum in doubly ionized lithium.

Stream:NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2003

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