The argon atom in the ground state corresponds to the electron configuration of the particle

The argon atom in the ground state corresponds to the electron configuration of the particle. 1) Ca 2) K + 3) Cl + 4) Zn 2+

In such tasks, a plate with the periodic table of chemical elements is simply needed. And then we can simply look at the data on the electronic structure of the valence layer. But recently, these data are sometimes not available. And then you can simply compare the elements according to their location in the table. And as a result, we get that K + is right for us. And this is because it follows argon in the table and in the case of one electron donation, the electronic configuration of its positively charged particle is similar to that of argon.