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1
(1)
What is the number of
He?
(2)
What is the number of
Si?
(3)
What is the number of
Ne?
(4)
What is the number of
P?
(5)
What is the number of
Sc?
(6)
What is the number of
O?
(7)
What is the number of
Li?
(8)
What is the number of
Mg?
(9)
What is the number of
Ca?
(10)
What is the number of
Na?
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