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1
(1)
What is the period of
K?
(2)
What is the period of
Be?
(3)
What is the period of
Al?
(4)
What is the period of
Ti?
(5)
What is the period of
O?
(6)
What is the period of
C?
(7)
What is the period of
P?
(8)
What is the period of
Ar?
(9)
What is the period of
Li?
(10)
What is the period of
Sc?
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