The horizontal row are called periods. The patterns are:
Bttom right of the Periodic Table
At the lower right corner of the Periodic Table.
The elements with the highest mass are on the bottom right of the periodic table.
A Periodic table The Periodic Table of the Elements.
atomic number
the nonmetallic elaments are on the right side of the periodic table
On the right side of the periodic table.
Elements that are insulators are on the right side of the periodic table.
The periodic table of elements is the arrangement of elements according to atomic number increasing from left to right across rows of the table.
It is called the Periodic Table of Elements.
The Elements on the far right side of the Periodic Table of the Elements are known as the Nobel Gasses.
By grouping the elements on the Periodic Table.