Question 267: Atoms & Nuclei

Question

The energy required to ionise a hydrogen like
ion in its ground state is 9 Rydbergs. What is
the wavelength of the radiation emitted when
the electron in this ion jumps from the second
excited state to the ground state ?

Accepted Answer

So, ionisation energy = (13.6 Z
2
) eV
= 9 $$ 	imes $$ 13.6 eV
$${1 \over \lambda } = R{Z^2}\left( {{1 \over {{1^2}}} - {1 \over {{3^2}}}} ight)$$
= 1.09 $$ 	imes $$ 10
7
$$ 	imes $$ 9 $$ 	imes $$ $${8 \over 9}$$
= 11.4 nm

Answer

35.8 nm

Answer

11.4 nm

Answer

8.6 nm

Answer

24.2 nm

Atoms & Nuclei

The energy required to ionise a hydrogen like ion in its ground state is 9 Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state ?

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