What is the ratio of the radius of the n = 3 orbit to that of the n = 2 orbit?
A)1.50
B)4.50
C)2.25
D)0.666
E)None of these is correct.

Question

Quizplus · Accepted Answer

The radius of an electron's orbit is proportional to n^2, where n is the principal quantum number. Therefore, the ratio of the radii of two orbits with quantum numbers n1 and n2 is (n2/n1)^2.

Here, we are comparing the third orbit (n=3) to the second orbit (n=2), so the ratio of their radii is (3/2)^2 = 2.25.

Therefore, the correct answer is choice C) 2.25.

What Is the Ratio of the Radius of the N