Radium

Glowing metallic element

Radium is a radioactive metallic element, discovered by Marie and Pierre Curie in 1898.

Once used in luminous watch dials and as a supposed health tonic, its dangers became clear as workers and consumers developed radiation poisoning.

Radium's eerie glow made it a symbol of atomic-age wonder before becoming one of caution.

historical

Marie Curie

Pierre Curie · 1898 · Paris · laboratory · isolation · polonium · scientific breakthrough · extraction · emanation · pioneering

element

atomic

Of elemental particles

alkaline earth · nucleus · decay · half-life · proton · electron · neutron · atomic number · alpha particle · nuclear

hazard

contamination

Introduction of impurities

decay · radon gas · environmental · cleanup · Superfund · safety · shielding · lead · disposal · half-life

medical

cancer treatment

Medical intervention for malignancy

radiotherapy · osteosarcoma · bone cancer · implant · therapeutic · dosage · exposure · contamination · medical history · quackery

luminescence

glow

Steady, soft light

  • luminousEmitting or reflecting light
  • watchPortable timekeeping device
  • clockDevice displaying time

instrument panel · phosphorescent · green glow · paint · factory · World War I · aircraft · military · darkness · visibility

Categories
Opposites
radioactive stability

Radiumlead

Dense metal, symbol Pb

hydrogen · iron · gold · helium · nitrogen

biological safety

Radiumcalcium

Element twenty, builds bones

potassium · essential mineral · nutrient · vitamin · magnesium

chemical reactivity

Radiumnoble gases

Nonreactive elemental group

helium · neon · argon · krypton · xenon

Phrases
Family

radio, radiate, radiation, radiant, radiator, radial, radius, radian, radiance

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Rated G