Edexcel GCSE Combined Science · 1SC0
Specification The periodic table, Group 1, Group 7, Group 0 · Paper 3, Paper 4
The arrangement of an atom’s electrons in shells, represented by a shell diagram or numbers such as 2.8.1.
Revise: The periodic tableAn electronic configuration describes how those electrons are arranged. In a neutral atom, the number of electrons equals the number of protons, so its atomic number tells you how many electrons to arrange.
- Revise: Group 1
The arrangement of electrons in an atom or ion, often written as the number in each occupied shell, for example 2,8,1.
- Revise: Halogen reactions and reactivity
1 more note
- Revise: Group 0
The arrangement of electrons in an atom's shells, for example 2,8 for neon.