Neptunium is a solid metal at room temperature, but undergoes beta decay becoming plutonium within a few days.
solid at room temp
Neptunium is a metal element. It is a solid in room temperature. It is in the f block of the Periodic Table.
it is gas at room tempreature.
liquid
Gaseous
Solid.
Solid
solid
Solid.
gas
Solid
It is a gas.