Which one of the following statements
is true for half-life of radioactive
matters?
(i) It depends on amount of the matter
(ii) It depends on types of the matter
(ii) It depends on phase of the matter
(iv) It depends on temperature of the
matter
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Yes, the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of radiation. This process changes the atom to a different element or a different isotope. Since radioactive decay is a spontaneous event, you may think that the half-life of the decay process is completely fixed and cannot be altered by outside influences. However, this statement
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