Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 7 The Structure of Atoms and Periodic Trends - Study Questions: 35

Answer

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Work Step by Step

Hydrogen and helium only have electrons in one orbital, in the ground state, whereas lithium has electrons in 2. The first peak for lithium and the peaks for hydrogen and helium should have comparable intensities (representing the 1s orbitals) and the second peak for lithium should be more intense since it represents a second shell orbital.
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