Examlex
Which of the following is NOT a public relations activity?
Arsenic
Referred to as a semimetallic chemical element, recognized for its role in historical poisoning cases, it has applications in electronics and wood preservation.
Lethal Dosage
The amount of a substance required to cause death in a living organism, often abbreviated as LD.
Mg
The chemical symbol for magnesium, a shiny gray solid that has the atomic number 12 and is an essential element for living cells.
Arsenic
A toxic metalloid with the symbol As, known for its various allotropes and compounds, many of which are potent poisons.
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