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Member for
3 ปี 7 เดือนAge: 11-14
Level: grade 7
Language: English
(en)
ไอดี: 1179656
18/07/2021
Country code: TH
Country: ไทย
Main content: Atomic mass (1953029)
With the help of a periodic table, find the symbols and the atomic mass of the given element. Round up or down the values
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