Na, is Sodium. It has an atomic mass of 23 and the atomic is 11. Meaning it has 11 protons and electrons and 12 neutrons. By having 11 electrons, there 1 electron on the outer sheel, meaning it's in group 1. Group 1 metals are known alkali metals and are found on the left side of the table.
This shows that Sodium (Na) is metallic.
