Answer
Therefore, sphere A is Ge.
Work Step by Step
These elements are found in different groups, but are located in the same period.
Atomic size increases as you move right in a period.
Therefore, the size of K > Ca > Ge > Kr
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 4 - Section 4.7 - Trends in Periodic Properties - Understanding the Concepts - Page 130: 4.80a
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