Question

The elements having the general configuration, $4f^{1-14}5s^{2}5p^6{d}^{0-1}6s^2$ are referred as

• A. alkali metals
• B. transition elements
• C. lanthanoids
• D. actinides

Answer 1

The correct option is C lanthanoids

Lanthanoids are 14 elements in the sixth period (Atomic number 58 to 71), that are filling $4f$ sublevel and their general configuration is $4f^{1-14}5s^{2}5p^6{d}^{0-1}6s^2$.