A Hydrogen Atom with a Barely Bound Electron May Have $14 \mu \mathrm { m } .$

question 104

Multiple Choice

A hydrogen atom with a barely bound electron may have an average radius as large as a bacterium, which is a radius of $14 \mu \mathrm { m } .$ What is the nearest principal quantum number of the atom in this state? The radius for ground state hydrogen is 0.0529 nm.

• A) 514
• B) 51
• C) 16
• D) 264,650

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