Question

@1: Describe the electronic configuration
of Na+, mg2+ and Al3+. Do they
have same number of electron
in the outermost shell?

Answer 1

Answer:

Na(11)- = 1s2, 2s2, 2p6, 3s1

Na+(10) = 1s2, 2s2, 2p6

Explanation:

No, They do not have same number of electrons

As Sodium contains 1 electrons in outermost shell,

and Sodium ion contains 8 electrons in outermost shell

Answer 2

Explanation:

Isoelectronic means that the ions have the same number of electrons in the same arrangement. ... As you go from Na+ to Mg2+ to Al3+, the number of protons in the nucleus increases and so pulls the outer electrons in more and more. The same thing is true for the other set of ions as well.