Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 40 - All About Atoms - Problems - Page 1251: 72

Answer

According to the “logical” sequence of quantum numbers, europium element would be chemically similar to sodium.

Work Step by Step

The number of electrons in per shell (having principle quantum number $n$) is calculated by the formula: $ N=2n^2$ An atom of europium has $63$ electrons. According to the “logical” sequence of quantum numbers, the shells will be occupied by $2, 8,18, 32$ respectively in first $4$ shells. So total $60$ electrons will be occupied in first $4$ shells. Among remaining $3$ electrons, $2$ will go to $5s$ state and last one will go into $5p$ state. Sodium has $11$ electron. According to the “logical” sequence of quantum numbers, the shells will be occupied by $2, 8$ respectively in first $2$ shells. Remaining $1$ electron will go to $3s$ state. Thus in both cases, there is only one electron in outermost sate. Thus, according to the “logical” sequence of quantum numbers, europium element would be chemically similar to sodium.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.