Question

What is the effective nuclear charge of Na+?​

Answer 1

Answer:

it is +ve 1 charge which is effective now on Na+

Answer 2

1s2 2s2 2p6

electronic configuration

electrons in last shell is (6+2)=8

so (8-1)×0.35+2×0.85=2.45+1.7=4.15

so screening effects=4.15

then z-eff=11-4.15=6.85