Column-I
(A) Electron moving in 2nd orbit in `He ^(+)` electron is
(B) Electron moving in `3 ^(rd)` orbit in H-atom
(C ) Electron moving in `1 ^(st)` orbit in `Li ^(+2)` ion
(D) Electron moving in `2 ^(nd)` orbit in `Be^(+3)` ion
Column-II
(P) Radius of orbit in which moving is `0.529Å`
(Q) Total enrgy of electron is `(-) 13.6 xx 9 eV`
(R) Velocity of electronis (`2. 188 xx 10 ^(6))/(3)m//s`
(S) De-broglie wavelength of electron is `sqrt((150)/(13.6))Å`

Answer

`A-s;B-r;C-Q;D-P`