Explanation:

The periodic table is generally divided into metals, non-metals, and metalloids. Metals are typically found on the left and center of the periodic table. Non-metals are located on the upper right side of the periodic table. Metalloids are found along the zigzag line that separates metals from non-metals. Transition elements are a specific group of metals located in the d-block, in the central part of the periodic table. Therefore, option C, non-metals, correctly describes the elements predominantly found on the right side of the periodic table.