Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 1 - The Nature of Chemistry - Exercise 1.12 - The Periodic Table - Page 36: 1


(a) 13 (b) 3 (c) 2

Work Step by Step

Use the periodic table inside the front cover. Of the 18 elements in the fourth period (row), 13 (potassium thru gallium) are metals, colored gray or blue; three (selenium, bromine, krypton) are nonmetals, colored purple; and two (germanium and arsenic) are metalloids, colored orange.
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