The radius of hydrogen atom in its ground state is 5 . 3 × 10 - 11 m . After collision with an electron it is found to have a radius of 21.2 × 10 - 11 m . What is the principal quantum number n of the final state of the atom?

Question

The radius of hydrogen atom in its ground state is 5 . 3 × 10 - 11 m . After collision with an electron it is found to have a radius of 21.2 × 10 - 11 m . What is the principal quantum number n of the final state of the atom?, n = 4, n = 2, n = 16, n = 3

MARKS App · Accepted Answer

r ∝ n 2 r f r i = n f n i 2 21.2 × 10 - 11 5.3 × 10 - 11 = n 1 2 n 2 = 4 n = 2

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