What are isoelectronic species? Select the isolectronic species from the following. `Li^+`, `N^(3-), Rb^+` , `F^- `, Ar , He

Select an electrophile and one nucleophile from the following. Br^+,NH_3,BF_3,OH^- .

The size of isoelectronic species F^- , Ne and Na(+) is affected by

Select the electrophiles and nucleophiles from the following species. HS^-, AlCl_3, (CH_3)_3 N, CH_3-overset(oplus)C=O,NH_3, overset(oplus)NO_2

Calculate the value of Avogardo Constant from the following data. Density of NaCl = 2.165 gcm^-3 , distance bet^n Na^+ and Cl^- in NaCl = 281 pm (molar mass of NaCl = 58.5 gmol^-1)

Arrange the following points in the ascending order of their distance from the origin:A(2,3),B(-2,2), C(sqrt2,2) , D(sqrt2,sqrt3) ,E(-1,-1) and F(sqrt2,-sqrt2)

Arrange the following in the increasing order (any three) : (i) F^- , Li^+ , Na^+ , Cl^- N, F, O, Ne (ionic radius )