Chemistry

Problem

The energy of an electron in the third Bohr orbit of singly-ionised helium (He

^+

) is measured to be

-6.04\,\text{eV}

. Using this information, determine the speed of the electron in its first Bohr orbit. Choose the closest value. a)

2.19\times10^{6}\,\text{m\,s}^{-1}

1.46\times10^{6}\,\text{m\,s}^{-1}

4.38\times10^{6}\,\text{m\,s}^{-1}

8.76\times10^{6}\,\text{m\,s}^{-1}