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Drops to the ground state. Use this formula. Hydrogen has a 1 Z number.

Frequency = (3.29 X 1015 Hertz) * Z2 * (1/Nf2 - 1/Ni2)

To keep it positive,

Frequency = (3.29 X 1015 Hertz) * 12 * (1/22 - 1/02)

= 8.23 X 1014 Hertz emitted

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