oxygen
(O) oxygen
bismuth
The ist group elements Alkali metals are most active elements.
Assuming that "least nonmetallic" means the same as "most metallic", francium.
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.
O stands for the element Oxygen. It is a nonmetallic element and the third most abundant element in the universe.
bismuth
Oxygen
Fluorine.
Fluorine
The ist group elements Alkali metals are most active elements.
Assuming that "least nonmetallic" means the same as "most metallic", francium.
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.
Its group 16
In terms of reactivity, Potassium(K) is the most reactive element among group 1 elements.
O stands for the element Oxygen. It is a nonmetallic element and the third most abundant element in the universe.
No. Be is active, but is nowhere near the most active element.
Group 17, the halogens