Russell
"It is also this power of penetration and speed of the 9th octave which not only unlocks the pressures of the lower inert gases, octave by octave, but also unlocks the pressures of the 8th, 7th, 6th and 5th octaves of radioactive elements. Most deadly among these are radium, thorium, actinium, strontium, barium, calcium, potassium, arsenic and phosphorus." [Atomic Suicide, page 262]

See Also

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Discord
Dispersion
Entropy
Radiation
RADIOACTIVE
Radioactivity