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An element's radioactive decay can be determined through a single equation which requires imputing the isotope's half life, its rate of decay and the decay time since the rate of decay is measured.

www.reference.com/world-view/calculate-exponential-growth-decay-191965d352b7cc7a

Exponential growth and decay can be determined with the following equation: N = (NI)(e^kt). In this equation, "N" refers to the final population, "NI" is the starting population, "t" is the time over which the growth or decay took place and the "k" represents the growth or decay constant. If necessa

www.reference.com/article/calculate-percentage-basic-calculator-d938a32eddb34656

Percentage can be calculated on a basic calculator by multiplying with the percent button. If the percent button is not present, the percent amount can be converted to a decimal and that can be multiplied instead.

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To calculate percentages on a calculator, divide the part by the whole and then multiply the answer by 100. For example, to find what percent of 80 is 20, divide 20 by 80. The result is 0.25, then multiply 0.25 by 100 which equals 25 percent.

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Writing a beta decay equations involves denoting the emission of a beta particle as the loss of an electron. Beta decay involves a neutron decaying into a proton and an electron emission (beta particle); the atomic number increases by one, but the mass number remains the same. The lost electron does

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Alpha decay happens when a radioactive particle decays into an alpha particle (helium-4 nucleus) and a new particle. The new particle has an atomic number that is two less than the original radioactive particle and an atomic mass equal to four less than the original particle.

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The equation for gamma decay is Axy equals Axy plus the gamma symbol, where A is the parent particle's atomic symbol, x is the particle's total number of neutrons and protons, and y is the total number of protons. The gamma symbol indicates a emission of gamma energy.