A Geiger counter can detect, for ten points, what phenomenon exhibited by unstable elements like uranium, which emit alpha particles to become a different, more stable element?
George Gamow described this process via quantum tunneling. This behavior is exhibited by the first artificially-produced element, technetium. A sample undergoes this process over a timeframe called a (*) half-life. A Geiger counter can detect, for ten points, what phenomenon exhibited by unstable elements like uranium, which emit alpha particles to become a different, more stable element?
George Gamow described this process via quantum tunneling. This behavior is exhibited by the first artificially-produced element, technetium.
radioactivity (accept radioactive decay; accept word forms; accept alpha decay; prompt on "decay" before "alpha" is read, and accept "decay" after "alpha" is read)