Question

periodic table basics
name

1. which elements had complete outer shells? give the name and symbol for each.

argon ar radon ra neon ne
what do you notice about the location of these elements?

Explanation:

Elements with complete outer - shells are noble gases. They are located in Group 18 of the periodic table. This group is also known as the inert gases due to their stable electron configurations.

Answer:

These elements (argon - Ar, radon - Rn, neon - Ne) are all in Group 18 of the periodic table.