Canonical tabular arrangement of the chemical elements by atomic number and recurring chemical properties, with blocks (s, p, d, f) corresponding to the valence sub-shells. An operational index into atomic-structure and periodic-trend…
Periodic table of the elements
Related concepts
- Periodic law
- Electronegativity (Pauling)
- First ionisation energy
- Electron affinity
- Hydrogen (H, Z=1)
- Carbon (C, Z=6)
- Nitrogen (N, Z=7)
- Oxygen (O, Z=8)
- Iron (Fe, Z=26)
- Gold (Au, Z=79)
- Noble gases
- Helium (He, Z=2)
- Lithium (Li, Z=3)
- Beryllium (Be, Z=4)
- Boron (B, Z=5)
- Sodium (Na, Z=11)
- Magnesium (Mg, Z=12)
- Aluminium (Al, Z=13)
- Silicon (Si, Z=14)
- Phosphorus (P, Z=15)