Answer
One type of atom (but perhaps isotopes of that element will be present).
Work Step by Step
This is discussed on page 214.
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 11 - Think and Explain - Page 224-225: 36
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