∴ Required Energy for the given process = E ∞ – E = – (– . ) . ev . Atom Uni-negative ion number of electron x – x number of protons x – x – number of neutrons y y Given that x of x x x x x y , .
% y = = 111x mass number = number of protons + number of neutrons = ( x – ) + .111x = x + .111x = .111x = x = x = . x = (whole number) ∴ Atomic number = x – = – = Mass number = Symbol of the ion C l − 11th Std Chemistry 11th Std Chemistry - - - - ) r z E z ev atom = − ( . ) . ( ) A o for Li + z = Bohr raduis for the third orbit (r ) = ( .
) ( ) = . × = . Å Energy of an electron in the fourth orbit (E ) = − . ( ) ( ) = – .
eV atom – ) Given v = . × ms – m p = . × – Kg λ λ h mv kgm s kg ms ⇒ λ [ ] A A m o o ) m = g = × – kg v = km hr – = ms v = . ms – λ λ λ h mv Kgm s Kg ms m ) ∆ x = .