why-the-first-ionisation-H-i1-energy-of-Oxygen-smaller-than-the-second-A-Due-to-the-nuclear-charge-B-Due-to-the-distance-of-the-electron-from-the-nucleus-C-Due-to-the-effect-of-spin-pair-repul

Question Number 64101 by Rio Michael last updated on 13/Jul/19

w h y t h e f i r s t i o n i s a t i o n (△ H_{i 1}) e n e r g y o f O x y g e n s m a l l e r

t h a n t h e s e c o n d ?

A . D u e t o t h e n u c l e a r c h a r g e

B . D u e t o t h e d i s t a n c e o f t h e e l e c t r o n f r o m t h e n u c l e u s

C . D u e t o t h e e f f e c t o f s p i n - p a i r r e p u l s i o n

D . D u e t o a s h i e l d i n g e f f e c t .

Commented by ngahcedric last updated on 07/Dec/20

i h a v e t h e s a m e q u e s t i o n