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Q.

Radius of 3rd orbit of Li2+ ion is x cm then which is not the de Broglie wavelength of electrons in the first orbit is (in cm)

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a

6πx

b

2πx3

c

2πx9

d

8πx3

answer is A, C, D.

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Detailed Solution

r∝n2Z;r1r3=n12n22=132=19;r1=x9∴r3=x∴2πr=nλ ∴2π×x9=1×λ⇒λ=2πx9

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