Cerium is reactive but not highly reactive.
It is very reactive
It is reasonably reactive. It has been used as a drier for alkyd paints. In that form it was Cerium Octoate.
cerium is reactive, if hit with a sharp object it will combust and release nitrogen and hydrogenated carbon. it is the most stable of the rare earth elements though
Elements are more reactive as you go down the periodic table and to the left.
the highly reactive metal is potassium
Sodium chloride is not highly reactive.
Potassium is highly reactive, even explosive in some circumstances.
Tin is highly reactive.
Nitrogen gas is stable. However there are nitrogen compounds that are reactive.
No, argon is not a highly reactive gas. It is stable.
Plutonium is a reactive chemical element.
No. They are mildly reactive.