The radius of the second Bohr orbit for hydrogen atom is (planck's constant h)=6.6262 x 10-34 Js; mass of electron =9.1091 x 10-31 kg ; charge of electron (e) = 1.60210x10-19 C; permitivity of vacuum (ɛo) =8.854185 x10-12 kg-1 m-3 A2)
(a) 1.62 Å (b) 4.76 Å (c) 0.529 Å (d) 2.12 Å
