Question

Write the electron configurations of the ions in NaF, MgCl2, CaO, and KBr.
(b) Which ions in part a are isoelectronic with neon atoms?

I understand the premise of electron configurations my question is how exactly do you find one of an ion? for example MgCl2 do you break them up into Mg+2 and Cl- and do each individually?

Answer 1

Yup that's exactly how you should do it :)

Answer 2

ohh ok awesome but in order to answer the second part would each part(Mg+2Cl-) equal to neon, assuming it was isoelectronic with it?

Answer 3

Mg+2 is isoelectronic with neon, but Cl- is isoelectronic with argon