WebApr 11, 2024 · half-life in British English. noun. 1. the time taken for half of the atoms in a radioactive material to undergo decay. Symbol: τ1/2. 2. the time required for half of a quantity of radioactive material absorbed by a living tissue or organism to be naturally eliminated ( biological half-life) or removed by both elimination and decay ( effective ... Webhalf-life: [noun] the time required for half of something to undergo a process: such as. the time required for half of the atoms of a radioactive substance to become disintegrated. the time required for half the amount of a substance (such as a drug, radioactive tracer, or pesticide) in or introduced into a living system or ecosystem to be ...

Definition of

Web1 day ago · By the time most people are 80, on certain memory tests, they can remember about half as much as when they were 50, Rogalski said. Despite being less sharp, older people following this trajectory ... WebAug 8, 2024 · We can determine the amount of a radioactive isotope remaining after a given number half-lives by using the following expression: amount remaining = initial amount × (1 2)n. where n is the number of half-lives. This expression works even if the number of half-lives is not a whole number. Example 11.5.1: Fluorine-20. how did hibiki anger the bubbles

Half-life definition and meaning Collins English Dictionary

WebThe biological half-life (t 1/2) has an immense role in the therapeutic efficacy and potency of drug molecules at the site where it is administered. If drugs have shorter t 1/2, then … Webhalf-life: [ haf´līf″ ] the time required for the decay of half of a sample of particles of a radionuclide or elementary particle; see also radioactivity . Symbol t ½ or T ½ . Webbiological half-life. T 1/2 Biology The time required for 1⁄2 of the total amount of a particular substance in a biologic system to be degraded by biological processes when the rate of … how many seers is snowflake worth mm2