Chemistry Principles And Practice
Chemistry Principles And Practice
3rd Edition
ISBN: 9781305295803
Author: David Reger; Scott Ball; Daniel Goode
Publisher: Cengage Learning
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Chapter 19, Problem 19.3QE
Interpretation Introduction

Interpretation:

The ratio of the density of tantalum to that of niobium is 1.94, which is nearly identical to the 1.95 ratio of their atomic weights. How this similarity is a result of the lanthanide contraction has to be explained.

Concept Introduction:

Lanthanide contraction:

The poor shielding of 4f orbital on nuclear charge results the increasing the attraction of 6s electrons towards the nucleus, it causes the atomic size reduction.

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