Question

radius of the fourth orbit in hydrogen atom is 0.85 nm .calculate the velocity of the electrons in this orbit .(mass of electron = 9.1* 10-31 kg)

Answer 1

Solution: (i) 9.11 × 10-28 g is the mass of 1 electron No. of electrons 1 g of mass = = 0.1099 × 1028 = 1.099 × 1027 (ii) Mass of 1 electron = 9.1 × 10-31 kg Mass of 6.023 × 1023 electrons = 6.023 × 1023 × 1.6 ... The value of ionization energy of hydrogen atom is 2.18 10—18 J (n=1) which is greater than that in the 5th orbit ...