8.28 What are inner transition elements? Decide which of the following atomic numbers are the atomic numbers of the inner transition elements : 29, 59, 74, 95, 102, 104.
Inner transition metals are those elements in which the last electron enters the f-orbital.
The elements in which the 4f and the 5f orbitals are progressively filled are called f-block
elements. Among the given atomic numbers, the atomic numbers of the inner transition
elements are 59, 95, and 102.
Praseodymium is 59
Americium is 95
Nobelium is 103
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