Inert/noble gases
The metals in the lower left corner of the periodic table are the least electronegative.
Group VII and Group 8 ( the noble gases)
Group 3 through Group 13
Tin is metallic because the shielding of electrons is so much that the electrostatic force is weak and so Tin is metallic. Moreover as we move from right to left in a periodic table and top to bottom along the group the metallic character increases. Hence Sn is metallic.
Assuming that "least nonmetallic" means the same as "most metallic", francium.
Neon is a noble gas and thus non-metallic.
Beryllium (Be) is a metal. It is in group 2 on the periodic table, which are called the alkaline earth metals.
Period 2, It only contains two metals, making it the least metallic period
Elements in group A are metals. They possess metallic behaviour.
Elements in group A are metals. They possess metallic behaviour.
Elements in group A are metals. They possess metallic behaviour.
The periodic table generally contains more metallic elements than nonmetallic elements. Metals are found on the left side of the periodic table and make up the majority of elements, while nonmetals are mostly located on the right side. However, there are exceptions, such as the metalloids group that have properties of both metals and nonmetals.