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Report Abuse. elements on the right side on the periodic table are unreactive, elements on the left are very reactive. The most unreactive elements are therefore the Noble gases.
What NON-METAL family is the most reactive and WHY? Alkali Metals (1) and Halogens (17) These 2 families of highly reactive elements are found in nature ONLY in compounds, never as just the element. Name the 2 families. Elements that have properties of BOTH metals and non-metals and are found along the zig-zag line on the periodic chart.