Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Exercises - Page 75: 2.24a


The difference between 210-Bi and 210-Pb is the number of protons each element contains within it's nucleus.

Work Step by Step

Bismuth has 83 protons while Lead only contains 82 protons. The number of protons determines an element's identity. What gives these two elements the same molecular mass of 210 is their number of neutrons. There are 127 neutrons in Bismuth and 128 neutrons in Lead.
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.