Neon and argon are both in group 18 of the periodic table. Which property do they most likely share?

Neon and argon most likely share the property of being inert gases or noble gases.

Neon and argon are both noble gases, which means they share the property of having a full outer electron shell. Noble gases are typically unreactive and have low boiling points.

To determine which property neon and argon most likely share, we need to look at their location in group 18 of the periodic table. Group 18, also known as the noble gases, is located on the far right side of the periodic table. The noble gases are known for their extremely low reactivity due to having a full outer electron shell, which makes them stable.

Therefore, the property that neon and argon most likely share is their low reactivity. They both have a full outer electron shell, so they do not readily form bonds with other elements. This property is characteristic of noble gases in general.