Concept explainers
(a)
Interpretation:
Samples of his hair and bones had C-14 activity that was 50% of that present in new hair and bone. C-14 undergoes beta decay and has a half-life of 5730 yr.
To find how long-agoOtzi lived.
Concept Introduction:
Radioactive decay equation:
where No is the initial activity, N(t) is the activity at time t, and t1/2is the half-life of the radioactive substance.
(b)
Interpretation:
To write a balanced
Concept Introduction:
According to the law of conservation of mass the sum of the
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