The 14 elements after actinium are called-

Correct option is C

The correct answer is (c) Actinides.
· The 14 elements that come after actinium (atomic number 89) in the periodic table are called actinides.
· These elements have atomic numbers from 90 (thorium) to 103 (lawrencium). Actinides are a series of heavy, radioactive elements that are typically found in the f-block of the periodic table.
· They are known for their use in nuclear reactors and weapons, with uranium and plutonium being notable examples.
Additional Knowledge:
· s block elements: These include elements from groups 1 and 2, such as alkali metals and alkaline earth metals, not the actinides.
· p block elements: These elements are found in groups 13 to 18 of the periodic table and include nonmetals, metalloids, and some metals.
· Lanthanides: The lanthanides are the 14 elements after lanthanum, and they are found just above the actinides in the periodic table.