In which block of the periodic table is uranium (U) found?

• A. f block
• B. p block
• C. d block
• D. s block

Answer: (A)

Verified step by step guidance

1. Recall that the periodic table is divided into blocks based on the electron subshell that is being filled with electrons: s, p, d, and f blocks.
2. Identify the atomic number of uranium (U), which is 92, and note its electron configuration.
3. Understand that uranium's electron configuration involves filling the 5f subshell, which is characteristic of the f block elements.
4. Recognize that elements filling the f subshell are known as the actinides and are located in the f block of the periodic table.
5. Conclude that uranium (U) is found in the f block of the periodic table.