The half life of a scandium-46 is 84 days. The scandium-46<span> is used in oil refining as a tracer to monitor the oil movement and it emits </span><span>extremely high energetic gamma/beta radiation. So the half-life of the radioisotope scandium-46 is 84 days. The </span>Scandium 46 created by neutron activation, is a synthetic isotope of Scandium.
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The first person to discover a Periodic Table was Dmitry Mendeleyev, a Russian chemist founded the periodic table in 1869.
Dmitri Mendeleev, considering he created it.
PH = -lg[H+]
pH = -lg[6.38·10-6] = 5.2
The answer is 1.88·10^-3 mg.
