Recently, an agricultural scientist utilised her scientific expertise to select Thallium for poisoning her in-laws’.
About Thallium:
It is globally known as the ‘poisoner’s poison’.
It was discovered by Sir William Crookes in 1861.
It is a metal belongs to the main Group 13 (IIIa, or boron group) of the periodic table.
It was used historically as a rodenticide.
Properties
It is tasteless and odourless.
It is a soft, heavy, and low-melting element of low tensile strength.
It does not dissolve in water.
It dissolves slowly in hydrochloric acid and dilute sulfuric acid and rapidly in nitric acid.
It is found in trace amounts in the earth’s crust.
This metal continues to oxidizeoxidise upon prolonged contact with air, generating a heavy nonprotective oxide crust.
Trace amounts of thallium are present in sulfide ores of zinc and lead; in the roasting of these ores, the thallium becomes concentrated in the flue dusts, from which it is recovered.
Applications: It is used in the manufacture of electronics, low temperature thermometers, optical lenses, and imitation precious jewels.
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