Exam (elaborations)
Electron structure: Atomic structure and the periodic table: Chemistry: GCSE (9:1)
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First shell can hold 2 electrons 2nd and 3rd shell can hold 8 electrons no of shells = Period on the periodic table Valence electrons Outer shell electrons which are involved in reactions No of valence electrons = Group number on the periodic table Hydrogen electron structure 1 Nitrogen...
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