If a Hydrogen Atom Originally in a State with Principal

Multiple Choice

If a hydrogen atom originally in a state with principal quantum number n is excited to state n' = 2n, then

A) its radius will quadruple and the binding energy will double.
B) its radius will quadruple and the binding energy will be reduced by a factor of four.
C) its radius and binding energy will quadruple.
D) its radius and binding energy will double.
E) its radius will double and the binding energy will quadruple.