According to the Bohr model of the hydrogen atom, the energy of an electron bound in energy level \(n\) is given by \(E_n = -\dfrac{E_0}{n^2}\), where \(E_0\) is a positive constant. The minimum energy required to ionize the atom is the energy needed to bring the electron from level \(n\) to \(n = \infty\). The ionization energy required for a hydrogen atom in its first excited state (\(n = 2\)) is what fraction or multiple of the energy required to ionize it from its ground state (\(n = 1\))?