Question

Calculate the velocity of an electron in the first orbit (n=1) of hydrogen atom (Z=1)

Answer 1

velocity of an electron = 2.18*10^6 m/s * Z/n
Therefore here,
velocity = 2.18*10^6 *1/1 m/s
= 2.18*10^6 m/s

Hope this helps you !

Answer 2

velocity of an electron = 2.18*10^6 m/s * Z/n
Therefore here,
velocity = 2.18*10^6 *1/1 m/s
= 2.18*10^6 m/s