Question

Which of the following is an inner transition element?

Answer 1

Option E) Th is correct answer. Thorium (Th) is inner transition element.

• The components that make up the f-block are those where the 4f and 5f orbitals gradually fill up.
• Although they are officially members of group 3, these elements are displayed separately in the f-block of the periodic table. Inner transition elements are another name for the f-constituent block's parts.
• Lanthanoids and actinoids are the names for the two series of inner transition elements that are 4f and 5f series, respectively.
• The inner transition elements U, Th, and Pa are excellent nuclear energy sources.
• The inner transition elements' electronic configuration is 4f1-14 5d0-16 s².
• Due to their uniform size and outer shell design, elements in a series would all have comparable qualities, making it difficult to distinguish them from one another.

Hence, thorium is inner transition element.

Learn more about lanthanoids here:

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