Find the values of ' a ' in equation ' ( a + 0.30 ) + 0.65 ( n − 1 ) ' which gives the value of effective nuclear charge experience by last electron of 2 nd period element. (where

Question

Find the values of ' a ' in equation ' ( a + 0.30 ) + 0.65 ( n − 1 ) ' which gives the value of effective nuclear charge experience by last electron of 2 nd period element. (where n is number of electrons in 2 nd shell)

TestHub · Accepted Answer

E : 1 s 2 ( 2 s 2 p ) n Z e ff ​ = ( n + 2 ) − [ 2 × 0.85 + ( n − 1 ) × 0.35 ] = n ​ + 2 − 1.70 − 0.35 ( n − 1 ) \displaylines = ( n − 1 ) + 1 + 0.30 − 0.35 ( n − 1 ) = 1 + 0.30 + 0.65 ( n − 1 ) a = 1

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