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The radius of fifth orbit of the Li⁺⁺ is ______ ×10⁻¹² m. (Take, radius of hydrogen atom =0.51 A)

Asked in JEE Main 6th April 1st Shift 2023 · Postulates, radius, speed and angular momentum

Answer: 425

Step-by-step solution

r=0.51(n²)/Z=0.51×(25)/3=4.25 A

4.25×10⁻¹⁰ m=425×10⁻¹² m

→ 425

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