Solve this : 8 Kinetic energy of electron in a mono electronic species is 312 KJ/mole Then - Chemistry - Structure of Atom

Question

Solve this :

8 Kinetic energy of electron in a mono electronic species is 312
KJ/mole Then which of the following statements are correct
(a) The electron is present in 2nd orbit of
He+ ion
(b) The electron is present in the 2nd orbit of H-
atom
(c) The electron is present in the 3rd orbit of
Li+2 in
(d) The electron is present in the fourth orbit of He+
ion

Bharti Paliwal · Accepted Answer

Dear StudentKintic energy = K z e22rwhere, K= 9*109 Nm2C-2              z= atomic number of the specie              e = 1
6*10-19 CThus, 312*103 = 9*109 * z2* (1
6*10-19)2 * r⇒312*103 * 29*109 * (1
6*10-19) = z2r⇒ z2r = 4
310-14⇒ zr = 2
0710-14 thus, Z=2 which is atomic no
 for HeThen the correct statements are (a) and (d)
Regards