Elements / 33
33As74.922
Arsenic
Metalloid · p-block · ring N · spoke 15
Arsenic is element 33, a metalloid. It sits on ring N (period 4) on spoke 15, the pnictogens. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 5.73 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 1,090 K · 817 °C | Terrain → |
| Boiling point | Not measured | Terrain → |
| Electronegativity | 2.18 | Terrain → |
| First ionization energy | 947 kJ/mol | Terrain → |
| Atomic weight | 74.9216 u | Terrain → |
| Crustal abundance | 1.8 ppm | Terrain → |
| Discovered | 1641 | 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
- James Marsh devised his famous 1836 test after John Bodle, accused of poisoning his grandfather's coffee, was acquitted.
- Its contamination of groundwater in Bangladesh has been called the largest poisoning of a population in history.
Checked against chemistryworld.com, who.int.
Spoke 15: Pnictogens
Ring N (period 4)
Play with Arsenic
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.