
Interpretation: The “stair-step” line on the periodic table needs to be explained.
Concept introduction: A table in chemistry, where all elements are arranged by increasing

Answer to Problem 3RQ
The stair-step line indicates the position of metals, non-metals and metalloids in the Periodic Table.
Explanation of Solution
The periodic table is a very useful way to arrange elements. In a periodic table, the border line between the metals and non-metals are defined as “stair-step” line. Elements that are on the right side of stairs, called non-metals and elements that are on right side of stairs, called metals. Elements along the stair-step line are known as metalloids.
In a periodic table, stair-step line separates metals from non-metals.
Chapter 3 Solutions
World of Chemistry
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