Question

Which group on the periodic table is the least reactive? Why?

Answer 1

Noble Gases

• Group 18 of the periodic table exhibits lowest reactivity.
• Elements with a full outermost valence shell, i.e., those with eight electrons in the outer shell, such as helium, neon, radon and others are the least reactive.
• Noble gases cannot gain or lose valence electrons by interacting with other elements, making them most stable or least reactive.