D and F Block Elements

Question

The number of element from the following that do not belong to lanthanoids is … and …

Accepted Answer

Option B. To determine the number of elements from the given list that do not belong to the lanthanoids, let's first define what lanthanoids are. The lanthanoids consist of the 15 chemical elements in the periodic table from Lanthanum (…) with atomic number 57 to Lutetium (…) with atomic number 71. Thus, lanthanoids include:

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D and F Block Elements

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