Kinetic energy of electron in a mono electronic species is +1313 lJ/mole. Then which of the following statements are correct (I) The electron is present in the 2^(nd) orbit of He^(+) ions (II) The electron is present in the 2^(nd) orbit of H atom (III) The electron is present in the 3^(rd) orbit of Li^(+2) ion (IV) The electron is present in the 4^(th) orbit of He^(+) ion

Kinetic energy of electron in a mono electronic species is +1313 lJ/mo

1.	Kinetic energy of electron in a mono electronic species is +1313 lJ/mole. Then which of the following statements are correct (I) The electron is present in the 2^(nd) orbit of He^(+) ions (II) The electron is present in the 2^(nd) orbit of H atom (III) The electron is present in the 3^(rd) orbit of Li^(+2) ion (IV) The electron is present in the 4^(th) orbit of He^(+) ion
Answer» I and II II and III I and III III and IV Solution :K.E. = `+ (Z^2)/(n^2) (13.6 eV)`/ATOM, K.E. `= + (Z^2)/(n^2) (1312 KJ)`/MOLE