Where is the lanthanide series located on the periodic table?

• A. In the separate row at the bottom of the periodic table, following element La (lanthanum)
• B. In the upper right corner, next to the noble gases
• C. In Group 1, alongside the alkali metals
• D. In the transition metals block, between Groups 3 and 12

Answer: (A)

Verified step by step guidance

1. Recall that the lanthanide series consists of 15 elements with atomic numbers from 57 (Lanthanum, La) to 71 (Lutetium, Lu).
2. Understand that these elements are part of the f-block of the periodic table, which is typically displayed separately from the main body of the table to keep the table more compact.
3. Identify that the lanthanides are placed in a separate row at the bottom of the periodic table, directly following the element Lanthanum (La), which is in Group 3 of the d-block.
4. Note that the lanthanides are not located in the upper right corner (which contains the noble gases), nor are they part of Group 1 (alkali metals), nor are they within the main transition metals block (Groups 3 to 12).
5. Conclude that the correct location of the lanthanide series is in the separate row at the bottom of the periodic table, following element La (lanthanum).