Final answer:
The correct order as we move from left to right across a row of the periodic table is metal, nonmetal, metalloid.
Step-by-step explanation:
The correct order as we move from left to right across a row of the periodic table is B. metal, nonmetal, metalloid. Metals are found on the left side of the periodic table, nonmetals are found on the right side, and metalloids are located along a diagonal line between the metals and nonmetals. An example would be moving from sodium (metal) to chlorine (nonmetal) to silicon (metalloid) in the third period of the periodic table.