Answer
a) Period 4 in the periodic table contains 18 elements.
b) Group 4A (or 14) in the periodic table contains 6 elements.
General, Organic, & Biological Chemistry 3rd Edition
by Smith, Janice
Published by
McGraw-Hill Education
ISBN 10:
0-07351-124-2
ISBN 13:
978-0-07351-124-5
Chapter 2 - Atoms and the Periodic Table - Problems - Page 49: 2.17
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