Edexcel A-level Chemistry 9CH0 · 1.20
Filling of subshells and paired spins
- Code
- 1.20
- In
- 1 Atomic Structure and the Periodic Table
- Course
- A-level Chemistry 9CH0
- Board
- Edexcel
Grade boundaries·Edexcel command words
Codes and titles are read by a script from Edexcel's published specification and have not been checked by a person. What each point covers is in the specification itself: Edexcel’s specification.
Points in 1 Atomic Structure and the Periodic Table
- 1.1 Structure of an atom
- 1.2 Relative mass and charge of subatomic particles
- 1.3 Atomic number and mass number
- 1.4 Numbers of subatomic particles in atoms and ions
- 1.5 Isotopes
- 1.6 Relative isotopic mass and relative atomic mass
- 1.7 Relative molecular mass and relative formula mass
- 1.8 Mass spectrometry and relative atomic mass
- 1.9 Mass spectra of diatomic molecules
- 1.10 Mass spectrometry and relative molecular mass
- 1.11 First and successive ionisation energies
- 1.12 Factors affecting ionisation energy
- 1.13 Ionisation energy trend across a period
- 1.14 Ionisation energy trend down a group
- 1.15 Evidence for electronic configuration
- 1.16 Electrons in the first four quantum shells
- 1.17 Orbitals and electron spin
- 1.18 Shapes of s- and p-orbitals
- 1.19 Electrons in s, p and d-subshells
- 1.20 Filling of subshells and paired spins
- 1.21 Electronic configurations of atoms and ions
- 1.22 s, p and d-block elements
- 1.23 Electronic configuration and chemical properties
- 1.24 Periodicity
- 1.25 Trends in properties across periods 2 and 3
- 1.26 Illustrating periodicity with data