Positronium ion
A positronium ion consist of a positron at the centre with an electron revolving round it.If the radius of hydrogen atom is r and positronium ion radius is R.Determine R/r.
Note : A positron has the same charge as a proton, but the same mass as an electron.
The answer is 2.
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1 solution
The bohr radius of hydrogen atom depends on 1/m.Use reduced mass technique for positronium ion you will get R=2r.( reduced mass will be m/2)....