Chlorine (halogen), because Argon is a Nobel gas
The most reactive nonmetal with eight letters and the fourth letter an O is chlorine. Chlorine acts as a catalyst in many reactions. It easily forms salts.
The most active nonmetal element is fluorine.
Oxygen (O) is a chemical element with the atomic number 8. It is a highly reactive nonmetal that is essential for life and plays a key role in various biological and geological processes. Oxygen is the most abundant element in the Earth's crust and atmosphere.
Potassium is the most reactive element with oxygen, readily reacting to form potassium oxide.
Elements are more reactive as you go down the periodic table and to the left.
Fluorine is the most reactive nonmetal in period 2 of the periodic table.
Chlorine and fluorine, with fluorine more reactive. Some would also include oxygen. (The two remaining halogens are not gaseous at room temperature.)
The most reactive nonmetal is fluorine
The most reactive metal is is francium, though cesium is often given this title due to francium's extreme rarity and short half life. The most reactive element is commonly said to be fluorine. But fluorine is a nonmetal.
Sulfur (S) is classified as an active nonmetal in period 4.
Chlorine is the most reactive gas element. Chlorine is in the halogen family.
The most reactive nonmetal with eight letters and the fourth letter an O is chlorine. Chlorine acts as a catalyst in many reactions. It easily forms salts.
fluorine
Francium is the most reactive metal and fluorine the most reactive nonmetal.
The most reactive nonmetal is fluorine. Fluorine is a halogen, which is Group 17 on the Periodic Table, and the halogens are the most reactive...
lithium and fluorine
Carbon is a very reactive nonmetal but not the most reactive.