Chlorine and fluorine, with fluorine more reactive. Some would also include oxygen. (The two remaining halogens are not gaseous at room temperature.)
Fluorine is classified as a nonmetal. It is a highly reactive, gaseous element that belongs to the halogen group in the periodic table.
A reactive non metal is an element that can gain the electrons or is more electronegative
A colorless, odorless, highly unreactive gaseous element. Xenon and similar elements are called Noble Gases
Chlorine is a nonmetal that is highly reactive with metals. It can form salts with metals through a chemical reaction known as metal chlorides.
Fluorine is a highly corrosive gaseous halogen that is capable of reacting with virtually all elements. It is extremely reactive and is usually found in compounds rather than in its pure form.
Fluorine is classified as a nonmetal. It is a highly reactive, gaseous element that belongs to the halogen group in the periodic table.
Fluorine
A reactive non metal is an element that can gain the electrons or is more electronegative
A colorless, odorless, highly unreactive gaseous element. Xenon and similar elements are called Noble Gases
phosphorous is a highly reactive nonmetal but fluorine is more reactive
Chlorine is a nonmetal that is highly reactive with metals. It can form salts with metals through a chemical reaction known as metal chlorides.
Fluorine is a highly corrosive gaseous halogen that is capable of reacting with virtually all elements. It is extremely reactive and is usually found in compounds rather than in its pure form.
Phosphorus is a nonmetal, because it does not form any monatomic positive ion.
Chlorine is a NON-METAL. As STP it is a green 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 other highly reactive element in period 2 is fluorine, a non-metal. Both lithium and fluorine readily form compounds due to their high reactivity.
Salt is a compound of Sodium (Na) and of Chlorine (Cl), thus, it is a nonmetal because it is a compound of 2 nonmetals. Na is not a nonmetal it is a highly active metal. This can be easily googled.