Group 1 metals which include Alkali metals, are the most metallic. Group 2 is the second most metallic group in the periodic table, consisting of mainly Alkali Earth metals. How metallic an element is depends on the number of electrons and valence electrons. I just learned about the periodic table.
They are known as group 1 elements and they include alkali and transition metals. Some of them are lithium, francium, copper and silver. It is mainly because they have one electron in their outer electronic shell making them more stable.