Chapter 22, Problem 1PS

Identify, based on the position in the periodic table, the actinide elements among those in the following list: Co, Cm, Cd, Ce, Cf.

Interpretation Introduction

Interpretation:

Actinide elements from the given list have to be identified.

Concept introduction:

The actinide series includes the 15 metallic chemical elements with atomic numbers from 89 to 103 and it starts from actinium through lawrencium.

Actinides are given below,

Actinium (Ac), Thorium (Th), Protactinium (Pa), Uranium (U), Neptunium (Np), Plutonium (Pu), Americium (Am), Curium (Cm), Berkelium (Bk), Californium (Cf), Einsteinium (Es), Fermium (Fm), Mendelevium (Md), Nobelium (No), Lawrencium (Lr).

Answer to Problem 1PS

Actinide elements are $Curium\left(Cm\right)andCalifornium\left(Cf\right)$

Explanation of Solution

Actinide elements are given below,

$Curium\left(Cm\right)andCalifornium\left(Cf\right).$

Rest of the elements, cobalt (Co), cadmium (Cd) is transition elements (d-block elements) and cerium (Ce) is lanthanum elements.

Conclusion

Actinide elements from the given list were identified.