oxygen
Nitrogen, the first element in Group 15, has the most nonmetallic properties. It is a diatomic gas at room temperature, demonstrating typical nonmetal characteristics such as covalent bonding and low reactivity.
Assuming that "least nonmetallic" means the same as "most metallic", francium.
The ist group elements Alkali metals are most active elements.
no, chlorine is not metallic, but it can come in various forms, most commonly a yellowish gas.
The most active group of nonmetals are those in Group 17, and these are the halogens. The list is headed by fluorine, which is the most reactive element of the group and of the Periodic Table as a whole.
Nitrogen, the first element in Group 15, has the most nonmetallic properties. It is a diatomic gas at room temperature, demonstrating typical nonmetal characteristics such as covalent bonding and low reactivity.
D. Oxygen. Oxygen is the most nonmetallic element in group 16, also known as the chalcogens. It has a high electronegativity and tends to gain electrons to form negative ions.
Fluorine.
Fluorine
Assuming that "least nonmetallic" means the same as "most metallic", francium.
The ist group elements Alkali metals are most active elements.
no, chlorine is not metallic, but it can come in various forms, most commonly a yellowish gas.
Its group 16
In terms of reactivity, Potassium(K) is the most reactive element among group 1 elements.
No. Be is active, but is nowhere near the most active element.
The most active group of nonmetals are those in Group 17, and these are the halogens. The list is headed by fluorine, which is the most reactive element of the group and of the Periodic Table as a whole.
Group 17, the halogens