Chapter 1, Problem 1.5PAE

Interpretation Introduction

Interpretation:

The region of the periodic table where critical materials are found should be identified.

Concept Introduction:

• Critical materials are rare earth metals
• There are different regions in the periodic table mainly depending on the chemical similarity of elements in a particular area.
• Depending on the type of sub shell which receives the last electron, elements have been classified into four periodic table blocks (s, p, d and f)