Answer
Pleas see the work below.
Work Step by Step
The required symbols of the elements are given as under
a. Br
b. Rn
c. Se
d. Rb
e. Pb
Chemistry 12th Edition
by Chang, Raymond; Goldsby, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0078021510
ISBN 13:
978-0-07802-151-0
Chapter 2 - Atoms, Molecules, and Ions - Questions & Problems - Page 72: 2.99
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