Actinide — অ্যাক্টিনাইড
Actinides are the 15 radioactive elements from actinium (Z 89) to lawrencium (Z 103), filling the 5f subshell.
Definition
The actinides are the 15 elements from actinium to lawrencium, atomic numbers 89 to 103, with the 5f subshell filling. Every one of them is radioactive — unique among the blocks — and most exist only when scientists make them atom by atom in reactors. Uranium and thorium are the natural pair found in minerals. Their radioactivity is both danger and gift: uranium-235 sustains chain reactions in power reactors, and plutonium-239, bred from uranium, does the same. Handling them is slow, shielded, glovebox work.
For example
Bangladesh's first nuclear power plant at Rooppur runs on uranium fuel — actinide atoms splitting in a controlled chain to light homes across the country.