Based on the correct choice in question (2), substitute numerical values to find the current represented by the electron in orbit around the nucleus.
I = ev/2πr
= (1.60 x 10⁻¹⁹C) (1.09_____ x 10⁶m/s) / 2π(2.12_____ x 10⁻¹⁰m)
= _____ mA