Question

tate energy Part A How much energy does the electron have initially in the nu4 excited state? Express your answer with the appropriate units. View Available Hint(s) E. = -1.36x10-19 J Submit Previous Answers ✓ Correct 7 of Part B ter What is the change in energy if the electron from Part A now drops to the ground state? Express your answer with the appropriate units. View Available Hint(s) AE = -2.04x10-18 J Son Previous Answers Correct MacBook Pro Q Search or type URL

Answer 1

For solving the above question simple formula for calculating energy of electron in present in n quantum number is used which is derived from Borh's
Past A Formula for enesgy of electron in nth prinople quantom nomber for hydrogen atom En = - 13.68 1.6 X 1019. Joules n2 - 136x10 J Eh = -136 X 16 X 10 " (4)² [for n= u Past B Enexgy of election in ground state ie in nal is E, = -136X16X1019 = -21.76X1019 I change in eneggy = E - Eu = (-21.76x10 m _ (-136 x 10")) a - 20-4X100 Joules AE - 2.04 x 108

Past & As hint given in Part B that absolute value of DE should be used for remaining calculate because it we use negative value of AE than we will get wavelength with negative re.sign which does not make any sense and it is absurd. Using formula AE = he DE = Energy released during transition of deatson, which h = plance constant is equal to energy = 6.626x1534 IS of needly formed photon ca speed of light & 3.0x108 m/s => date ( 6-626x 16°x3x10") JE I 2.04 x tāls 9.744 x 10 m
atomic model of hydrogen like atom and formula used in Part C is to calculate the energy of photon when wavelength is known.