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1
(1)
What is the period of
Ne?
(2)
What is the period of
He?
(3)
What is the period of
S?
(4)
What is the period of
Sc?
(5)
What is the period of
Be?
(6)
What is the period of
O?
(7)
What is the period of
Cr?
(8)
What is the period of
C?
(9)
What is the period of
Al?
(10)
What is the period of
V?
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