how is the second one not the right answer

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Use the Balmer equation to calculate the wavelength in nanometers of the spectral line for hydrogen when n=5 and m=2. Express your answer in nanometers to four significant figures. Correct Correct answer is shown. Your answer 434nm was either rounded differently or used a different number of significant figures than required for this part. Part B What is the energy in kilojoules per mole of the radiation corresponding to this line? Express your answer in kilojoules per mole to four significant figures. X Incorrect; Try Again; 3 attempts remaining Which atom in each of the following pairs has a larger radius? Match the items in the left column to the appropriate blanks in the sentences on the right. When comparing C and Ge,C has a radius than Ge because C is located the group in the periodic table. When comparing Ni and Pt,Ni has a radius than Pt because Pt is located the group in the periodic table. When comparing Sn and I, Sn has a radius than I because Sn is located to the left in the same period in the periodic table. When comparing Na and ] b because Na is located in the group in the periodic table