Uses of actinoids: The three most important actinoids which find uses as such or in the form of their compounds are thorium, uranium and plutonium.
i. Thorium: It is used in atomic reactors and in the treatment of cancer. Its salts are used in making incandescent gas mantles.
ii. Uranium: It is used as a nuclear fuel. Its salts are used in glass industry (for imparting green colour), textile industry, ceramic industry and in medicines.
iii. Plutonium: It is used as a fuel for atomic reactors as well as for making atomic bombs.
d and f-Block Elements:
Properties of K2Cr2O7:
Properties of KMnO4:
Chemical reactivity of lanthanoids: