The Elements

Music by Tom Lehrer 1959 · Coni WASM-GC Quantum & Homoiconic Edition
00:07.30 / 01:35.00
There's antimony, arsenic, aluminum, selenium, ♪ Argon
18
Ar
ARGON
NOBLE GAS • ▶ SUNG #009 @ 0:07.30
🖐️ Drag 3D Atom to Rotate · Spacebar Play/Pause · ←/→ Cycle Z
λ CONI S-EXPR (defelement :Ar {:z 18 :name "Argon" :shells [2 8 8] :orbital "[Ne] 3s² 3p⁶" :λ [415.9 420.1 451.1 696.5 706.7]})
ATOMIC ESSENTIALS 3P-BLOCK
PROTONS / ELECTRONS 18 p⁺ / 18 e⁻
VALENCE ELECTRONS 8 e⁻ (3p-Block)
SHELLS (K-Q) 2 · 8 · 8
ORBITAL CONFIG [Ne] 3s² 3p⁶
ATOMIC WEIGHT 39.948 u
PERIOD / GROUP Period 3 · Group 18

Makes up nearly 1% of the air you breathe, almost all of it created by the slow radioactive decay of Potassium-40 deep within Earth's crust.

NOTABLE USES UTILITY
#1TIG & MIG arc welding shielding atmosphere
#2Double-pane thermal window insulation
#3Historical museum document preservation
#4Blue-green argon-ion surgical lasers
SPECTRAL FINGERPRINT 380–750 NM
400nm 500nm 600nm 700nm
λ = 415.9 · 420.1 · 451.1 · 696.5 · 706.7 nm