An unknown radioactive element decays into non-radioactive substances, In 910 days the radioactivity of a sample decreases by 45 percent. (a) What is the half-tite of the element? (days) (b) How long will it take for a sample of 100 mg to decay to 87 mg? time needed

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.