| 1. | Here n is principal quantum number, l is orbital quantum number.
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| 2. | The radii also increase down the group due to increase in principal quantum number.
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| 3. | The energy levels in the hydrogen atom depend only on the principal quantum number.
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| 4. | The principal quantum number in hydrogen is related to the atom's total energy.
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| 5. | As with the principal quantum number, higher numbers are associated with higher potential energy.
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| 6. | The principal quantum number describes the energy of the electron and is always a positive integer.
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| 7. | In X-ray notation, the principal quantum number is given a letter associated with it.
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| 8. | These are the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.
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| 9. | For a hydrogenic atom, the gross structure energy levels only depend on the principal quantum number n.
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| 10. | The principal quantum number arose in the solution of the radial part of the wave equation as shown below.
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