Thorium (90)
Yes. All of the actinides are radioactive.
All actinides are radioactive elements and some are man made.
All actinides are radioactive elements and some are man made.
radioactive
The actinides
mosley
Because the nuclei of actinides are unstable and spontaneously break apart, all actinides are radioactive.
Actinium Symbol: Ac Atomic Number: 89
They are F-block elements
No, it is a metal, as all the other actinides are.
importance abuot actinides
The lanthanides get their name from the element lanthanum, which was the first in the series to be discovered. The actinides get their name from actinium, which was the first element in this series to be discovered.