Which is the most reactive and least reactive non metal?

Most reactive non-metal:

• As fluorine is the most electronegative of all the non-metals in the periodic table, therefore, it is the most reactive non-metal.
• Fluorine has a high tendency to receive electrons from other atoms or ions due to its strong electro negativity and tiny size.
• As a result, all other substances are oxidized.

Least reactive non-metal:

• Helium is the least reactive of the non-metallic elements.
• Helium is a chemical element with the atomic number $2$ and the symbol $\mathrm{He}$.
• It's an inert gas that's colourless, odourless, tasteless, and non-toxic.
• Fluorine is thus the non-metal with the highest reactivity. The non-metal helium is the least reactive.