D And F Block, Chemistry, Short Notes, 12 Class.
radioactive due to unstable nuclei, making them valuable in nuclear energy but posing environmental concerns. ➭ Examples: Lanthanum (La), Cerium (Ce), Gadolinium (Gd), Ytterbium (Yb), Plutonium (Pu), and Uranium (U). D-Block Elements ➡️ The d-block elements are present from the fourth period