Example of Actinides

In actinides, electrons are progressively filled in the 5f orbitals. They exhibit several oxidation states, the preferred oxidation state being +4. Some of them like U, Np, Pu etc. can exist in +6 oxidation state also. Periodic table
Actinides are heavy metals having high melting points and forming alloys with other metals. Thorium, uranium and plutonium are used as nuclear fuels.
Element (Symbol) Atomic Number Electronic Configuration
Actinium (Ac) 89 6d17s2
Thorium(Th) 90 6d27s2
Protoactinum(Pa) 91 5f26d17s2
Uranium(U) 92 5f36d17s2
Neptunium (Np) 93 5f46d17s2
Plutonium (Pu) 94 5f67s2
Americium(Am) 95 5f77s2
Curium(Cm) 96 5f76d17s2
Berkelium(Bk) 97 5f86d17s2
Californium(Cf) 98 5f107s2
Eisteinium(Es) 99 5f117s2
Fermium(Fm) 100 5f127s2
Mendelevium(Md) 101 5f137s2
Nobelium(No) 102 5f147s2
Lawrencium(Lr) 103 5f145d17s2
Actinides are heavy metals having high melting points and forming alloys with other metals. Thorium, uranium and plutonium are used as nuclear fuels.
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