\textbf{198-} In the hydrogen atom, the electron energy at one level is $-0.85\text{ eV}$. If the electron transitions from this level to the level where the electron energy is $-3.4\text{ eV}$, the speed will be how many times? $\left(E_R = 13.6\text{ eV}\right)$
\[
4 \quad (4) \qquad\qquad 2 \quad (3) \qquad\qquad \frac{1}{2} \quad (2) \qquad\qquad \frac{1}{4} \quad (1)
\]