half life Definition

half-lives, plutonium, lawrencium, astatine, berkelium, polonium, radium, radon, curium, tritium, muon, technetium, neptunium, fermium, half-life, rutherfordium, actinium, actinon, francium, protactinium, rubidium-strontium dating, strontium, iodine, mean life, phosphorus, tellurium, uranium, americium, dubnium, einsteinium, iodine-125, iodine-131, meitnerium, mendelevium, seaborgium, semitontine, caesium, californium, carbon, carbon 14, cobalt, darmstadtium, diazepam, gold, mu-meson, negative muon, nobelium, potassium-argon dating, promethium, radiocarbon dating, roentgenium, rubidium, thorium, thoron, unstable, afternoon, average, back, bad, baf, base, bsd, climate, common, compromise, dating, degree, end, ended, energy, episode, estate, eve, field, fifty, game, greek, green, greens, hard, heart, hearts, holiday, ill, keep, keeps, lead, long, man, mean, means, medium, meridian, mid, middle, mine, minor, moribund, nasty, night,