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## Main Question or Discussion Point

**most probable radii in hydrogen....?**

i just started studying quantum mechanics in college...i was told that according to quantum theory the most probable radii of 1s 2s and 3s in hydrogen are respectively a 6a and 11a, where a=bohrs radius for 1st shell

sir told me that we get these values by solving equations for probability....something about differentiating it and then putting it equal to 0

can anyone please provide me any link where these equations and hopefully more numerical problems are solved? i googled this but could not find anything understandable....so please provide something for starters

thanks