This radioactive metallic element,
has a lot of power under his belt.
A beta emitter with a mysterious shine,
with a twenty-one years half time.

Blue like a spaceship reactor,
got a sci-fi factor.
First isolated it was called Emanium,
but previously predicted Actinium.

Friedrich Oskar Giesel isolated it,
from André-Louis Debierne discovered and predict.
A whole group comes as actinoides,
similar to the ligther lanthanoides.

The main isotope is too radioactive,
with that, not so attractive,
it is high priced as well,
but used in spacecraft thermoelectric cell.

The twohundrettwentyfive,
might probably save your life.
It is an alpha emitter and used in treatment,
for cancer distruction meant.

Ten days of a halftime,
cancer has no fun time.
In addition it needs some complex agent,
otherwise it causes cancer after the healing event.

Not easy to handle, but a beautiful shine,
if used correctly it is fine,
You might never see it, but it might help you heal,
then its use is absolutely real,

Stay save, take care,
Actinium, a high energy metal with flair.
Not artificical, not made from human kind,
in the uranium radioactive chain aligned.