Answer
Compound
Work Step by Step
When chalk was heated, two different substances (a gas and a solid) were produced. It means that chalk is not an element, but a compound. Elements cannot be broken down chemically into simpler substances.
Chemistry: Atoms First (2nd Edition)
by Zumdahl, Steven S.; Zumdahl, Susan A.
Published by
Cengage Learning
ISBN 10:
1305079248
ISBN 13:
978-1-30507-924-3
Chapter Review - Exercises - Page 27f: 73
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