bromine!
Bromine.
Nitrogen is a group 5A element that is highly reactive and essential for plant growth.
Gold is highly malleable and almost non-reactive.
rubidium
Chlorine is a Highly reactive element.
Plutonium is not highly reactive under normal conditions. It is a relatively stable element that does not react readily with air or water. However, it can be reactive in certain chemical reactions or when exposed to high-energy particles.
A reactive non metal is an element that can gain the electrons or is more electronegative
Halogens.
The element you are referring to is likely Phosphorus. It is a highly reactive non-metal element that can exist in various forms, one of which is a poisonous, smelly red liquid known as phosphorus red. It should be handled with caution due to its toxicity and flammability.
Pure sodium is a highly reactive element. When placed in water, sodium will actually explode, producing flames and concussive forces.
Chlorine and fluorine, with fluorine more reactive. Some would also include oxygen. (The two remaining halogens are not gaseous at room temperature.)
Bromine