most dangerous element in the world?

Plutonium. When machined as it is to assemble atomic bombs a fine

dust is generated, which emits alpha radiation. The radiation from even

a small amount of plutonium dust inhaled into your lungs will give you

lung cancer. Plutonium is therefore handled in sealed glove boxes.

However, the dust can get in the ventilation system, as it did at the

Rocky Flats plant outside of Denver, requiring an incredibly expensive

cleanup if it is not to be released into the atmosphere.

The most dangerous element you're likely to meet in chemistry is

probably mercury. It evaporates readily at room temperature, and the

concentrated vapor is highly poisonous. It can cause brain damage over

the long term. This is why chemistry teachers are quick to clean up

broken thermometers: although there is not much danger from the tiny

amount of mercury in a thermometer, it pays to be safe.

The most dangerous element in general public circulation is probably

lead. It is put into the air by burning and fueling with leaded

gasoline, and it appears in old paint. It also can cause brain damage,

especially in young children. For this reason among others the federal

government banned the sale of leaded gasoline, and the State of Illinois

recommends that young children be tested for lead in their first few

years.

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platinum (Pr)

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