Answer:
a) i) The half-life of a radioactive substance is a characteristic constant. It measures the time it takes for a given amount of a substance to halve due to decay and, therefore, radiation.
ii) The number of neutrons and protons in the nucleus:
Number of protons: 6
Number of neutrons: 14-6 = 8
b) i)
ii)
c) i) We use the equation
ii)
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