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Question
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.
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Solution
Inner transition elements
The elements constituting the f-block are those in which 4f and 5f orbitals are progressively filled. These elements are formal members of group 3 but are shown separately as f−block of the periodic table. The elements of f−block are also called inner transition elements.
These includes lanthanoids (Z=58−71) and actinoids (Z=90−103).
From the given atomic numbers, the inner transition elements are the ones with atomic numbers 59,95 and 102.
The elements constituting the f-block are those in which 4f and 5f orbitals are progressively filled. These elements are formal members of group 3 but are shown separately as f−block of the periodic table. The elements of f−block are also called inner transition elements.
These includes lanthanoids (Z=58−71) and actinoids (Z=90−103).
From the given atomic numbers, the inner transition elements are the ones with atomic numbers 59,95 and 102.
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