A slippery 205.75 kg crocodile slides down a slick 6.00 meter long riverbank. It takes the crocodile 1.25 seconds to get from the top (at rest) to the water below.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material