First, how countless electrons go calcium have? It"s atom number is 20; this means that it has actually 20 protons and also 20 electrons.

You are watching: Ground state electron configuration for calcium ion

By abbreviated, one assumes that us would begin with the vault noble case. In the instance of calcium, that would be argon.

So Calcium"s abbreviated electron structure would it is in 4s2 (because that is in the second column and also on the fourth row). As Calcium is a metal, it loser electrons to come to be an ion. So that would lose the 2 electrons. That would certainly make its abbreviation electron structure just . The calcium ion has 18 electron so it is isoelectronic v Argon.

We would execute something comparable with Sulfur. Sulfur has actually 16 electron - therefore its structure would be 3s2 3p6; it would get 2 electrons to end up being an ion (non-metals gain), for this reason its ion framework would it is in 3s2 3p8 and that provides it additionally isoelectronic v Argon.

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