Chapter 17, Problem 32R

To determine

To Choose: The correct option.

Answer to Problem 32R

Option D

Explanation of Solution

Introduction:

The periodic table is mainly divided into four groups in which different elements are involved.

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The elements in between atomic number Z = 57 (lanthanum) and Z = 72 (hafnium) and between actinium (Z = 89) and rutherfordium (Z = 104) are inner transition elements.

Elements 58 - 71 which follows lanthanum, are the lanthanides and elements 90 - 103 which follows actinium, are the actinides. Neptunium is (Z = 93) which is following the actinides, lies in the inner transition elements.

Conclusion:

Thus, neptunium is a part of inner transition elements.