f-block elements are called inner transition elements because:
The last electron enters into the f-orbital penultimate shell
The last electron enters into the f-orbital of anti-penultimate shell
They are taken out of transition element
They have properties similar to transition elements
As we have learned
f -Block elements -
The two row of elements at the bottom of the periodic table called the lanthanoids
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In f-block elements the last electron enters into the f-orbital of anti penultimate shell.
Therefore, Option(2) is correct
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