// MATTER · ELEMENT 33 / 118atoms.no/elements
As33
Arsenic
As·Z 33·Metalloid·74.92·⭕ 1A · G♯ Minor
▸ The reading
interpretive · artArsenic ran the Victorian inheritance economy — odourless, tasteless, mimicking natural illness — until Marsh's test turned chemistry into a courtroom witness. It sublimes straight from solid to vapour, skipping the liquid compromise. Now it sits lawfully inside gallium-arsenide semiconductors. Poison, evidence, then infrastructure: three acts, one element.
The science below is cited as science; the symbolic layers are flagged as interactive art.
⚜ Periodic Frequency
1AG♯ Minor
a seat struck in brass — testimony, not prediction
the seat has its own room on ⭕ THE OVAL TABLE — tap the code
▸ The lenses
▸ Discovery
Albertus Magnus is credited with the first description of pure arsenic; ancient civilizations used its sulfide ores · Germany · ~1250
▸ Stellar origin
Weak s-process + r-processMixed origin — slow neutron capture in AGB stars contributes, with r-process events filling in heavier isotopes.
▸ Reactivity
Sublimes (skips liquid) at 615 °CToxic in nearly any form. Disrupts ATP synthesis at the cellular level — the Victorian poisoner's element of choice.
▸ Applications
- III-V semiconductors (GaAs)
- Wood preservative (CCA, now phased out)
- Pesticides (largely discontinued)
- Anti-leukemia drug (As₂O₃)
▸ Curiosity
Victorian inheritance plots ran on arsenic — odorless, tasteless, mimics natural illness, and it took a chemist named Marsh to catch the killers.
▸ Related readings
a resonance drawn between readings — not a claim that they share an origin.
Group 15PPhosphorusSbAntimony
Period 4GeGermaniumSeSelenium
p-blockGeGermaniumSeSelenium
Adjacent ZGeGermaniumSeSelenium