At issue here is the huge variable that speaks to the storage conditions. The vaults where motion pictures are archived at the Academy of Motion Picture Arts and Sciences have about the best environmental controls on them that can be had. And they "guestimate" a one hundred to two hundred year lifetime for celluloid, which is the stuff that is the film itself. This may or may not be the final word on the issue.
they are stable
It is because they are chemically stable.
Pure sodium is very reactive and therefore not chemically stable.
it's stable, but it is a reactive element!
Neon is chemically unreactive and stable
Manganese is not radioactive; chemically is sufficiently reactive.
chemically stable: very few things will react with it chemically unstable: many things will react with it and it can react violently ur mr.notso awsome
Nitrogen is sufficiently stable.
yes
Yes
If the atom is chemically stable it doesnt need to bond, it is chemically stable when the outermost level is completely full of electrons
An element that very few things react to.