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Member for
2 ปี 6 เดือนAge: 12-18
Level: 8/9
Language: English
(en)
ไอดี: 1623951
09/11/2021
Country code: JM
Country: Jamaica
Main content: Structure of the atom (1612003)
structure of atoms, electronic configuration, shells and valancy.
Other contents: Electronic configuration
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