mariahisawsome1
30.06.2019 •
Chemistry
As the period number increases on the periodic table (moving from the top of the table to the bottom), a. the atomic number increases and the atomic mass decreases. b. the atomic number decreases and the atomic mass increases. c. the number of the principal energy level containing the outer electrons increases. d. the number of the principal energy level containing the outer electrons decreases.
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Ответ:
C) the number of the pricipal energy level containing the outer electrons increases
Ответ:
The Answer is C
Explanation:
I just finished taking the test :) with that question on it