Chemistry · Structure of atom

The specific charge (\( e/m_e \)) of an electron was determined by J.J. Thomson. What is the experimentally accepted value of \( e/m_e \) for an electron?

1. \( 1.758820 \times 10^{11} \text{ C kg}^{-1} \)
2. \( 1.602176 \times 10^{-19} \text{ C kg}^{-1} \)
3. \( 9.109382 \times 10^{-31} \text{ C kg}^{-1} \)
4. \( 1.758820 \times 10^{8} \text{ C kg}^{-1} \)