Elements / 11
11Na22.990
Sodium
Alkali metal · s-block · ring M · spoke 1
Sodium is element 11, an alkali metal. It sits on ring M (period 3) on spoke 1, the alkali metals. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 0.968 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 371 K · 98 °C | Terrain → |
| Boiling point | 1,156 K · 883 °C | Terrain → |
| Electronegativity | 0.93 | Terrain → |
| First ionization energy | 496 kJ/mol | Terrain → |
| Atomic weight | 22.9898 u | Terrain → |
| Crustal abundance | 23,600 ppm6th most abundant in Earth's crust of 92 | Terrain → |
| Discovered | 1702 | Terrain → |
Values from open reference data; see sources. "Terrain" opens that property as a 3D landscape across the whole spiral.
Two things you might not know
- Its symbol abbreviates a Neo-Latin word recalling the Egyptian mineral natron; Davy freed it by electrolysis in 1807.
- Half of table salt; its vapour lights many city street lamps, and the pure metal explodes on contact with water.
Checked against en.wikipedia.org.
Spoke 1: Alkali metals
Ring M (period 3)
Play with Sodium
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.