What is radioactive decay?, the creation of atoms , unstable nucleus loses energy by radiation , the heating of atoms , the mixing of electrons, A material is considered radioactive if it contains…, stable nuclei, water molecules , unstable nuclei , electrons only, The decay rate depends on, the color of substances , the number of undecayed nuclei present , the temperature only, the amount of time , If there are more radioactive atoms, the decay will be, faster , Slower, the same , impossible , What happens to the decay rate over time?, it only increases , STAY COSNTANT (right answer), stops immediately , it slows down , what is half time?, The time for all atoms to disappear, The lifetime of a nucleus, The time for half of a radioactive substance to decay, The time of radiation travel, After one half-life, 100 g of a substance becomes:, 50, 52, 67, 91, What does the decay constant (λ) represent?, The probability of decay per unit time, The speed of light , The mass of nucleus, The initial number of nuclei , In alpha (α) decay, the nucleus emits:, an election , a helium nucleus , a photon , a neutron , Gamma (γ) decay produces:, a proton , a helium nucleus , an electron , a photon .

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