Which toxic substance is liquid at room temperature and found in fluorescent light bulbs? Group of answer choicesLeadCadmiumMercury
Question
Which toxic substance is liquid at room temperature and found in fluorescent light bulbs?
Group of answer choices
- Lead
- Cadmium
- Mercury
Solution
The toxic substance that is liquid at room temperature and is commonly found in fluorescent light bulbs is Mercury.
Fluorescent light bulbs utilize mercury vapor to produce light. When an electric current is passed through the vapor, it generates ultraviolet light, which then excites a phosphor coating inside the bulb, causing it to emit visible light. Mercury is particularly concerning due to its toxic properties and potential environmental impact when bulbs are disposed of improperly.
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Lead: This is a solid metal at room temperature and is often used in batteries and solder but is not typically present in significant quantities in fluorescent bulbs.
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Cadmium: Also toxic, cadmium is a solid metal at room temperature and is found in some types of batteries and coatings but is less commonly associated with fluorescent lights.
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Mercury: This is a unique element that is liquid at room temperature and is known for its highly toxic nature. It is present in small amounts in fluorescent light bulbs and is one of the reasons that these bulbs need to be disposed of properly to prevent mercury leakage into the environment.
Therefore, the correct answer is Mercury.
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