Electron structure: Atomic structure and
the periodic table: Chemistry: GCSE
(9:1)
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 electron structure
2,5
the periodic table: Chemistry: GCSE
(9:1)
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 electron structure
2,5
