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The radius of the first orbit of hydrogen is 0.53 A. Which orbit has a radius of 4.77 A?

The radius of the first orbit of hydrogen is 0.53 A. Which orbit has a radius of 4.77 A?

Explanation

r = n^2 x 0.529 A

r = 3^2 x 0.529 A

r = 9 x 0.529 A