# F. Calculate the Calculate the energy of a photon emitted when an electrina hydrogen atom makes...

###### Question:

f. Calculate the Calculate the energy of a photon emitted when an electrina hydrogen atom makes transition from the n = 7 ton =2 energy level. 18 energy level an electron in I 2.18 xroll -19 in ) =-5.01x10-19 n = 6.62640 C = 3.00 x108 my Ab exctron= R (Ini? - / n ) = -5.01 t photon = -D Election - 1/²) 2. 18x10 J E photon - he (10204-.25) 1 (6.626x10 s 1 (3.00810ns). -5.01810-19 Calculate the wavelength in nm of this photon. This transition represents the 5th line in the Balmer series. Why don't we see 5 lines when we view the emission spectrum of hydrogen?

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