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#4486 |
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The following is a suggested protocol:
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#4487 |
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1. Using the hazard assessment described in Section 3.5.3, identify:
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#4488 |
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* The similar exposure group [i.e., process, job, task, agent (i.e., beryllium) and specific population at risk].
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#4489 |
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* The appropriate standard for airborne exposure or surface contamination.
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#4490 |
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2. Conduct a sampling campaign.
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#4491 |
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1. Determine the number of samples to take.
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#4492 |
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2. Take the samples.
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#4493 |
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3. Determine the data distribution (e.g., normal or log normal) and calculate the appropriate descriptive statistics.
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#4494 |
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4. Compare the results with the appropriate standard.
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#4495 |
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Element Buddy- Beryllium
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#4496 |
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Beryllium (symbol Be) is the fourth element of the periodic table, with an average atomic mass of approximately 9. It is not found in a pure form in nature, most commonly in the form beryllium aluminum silicate (Be3Al2Si6O18), a picture of which is below. Pure Beryllium is brittle and greyish in color, also shown below. It is a solid at room temperature.
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#4497 |
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Beryllium aluminum silicate Pure Beryllium
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#4498 |
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The word Beryllium comes from Greek. It was also called Glucinium, from the Greek word for sweet, glykys. Beryllium tastes sweet, but should not be eaten to verify this.
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#4499 |
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The Egyptians knew of both emerald and beryl, both forms of beryllium aluminum silicate. A French chemist, Nicholas Louis Vauquelin, determined Beryllium to be a distinct element in 1797, but it was not isolated until 1828, when the German chemist Friedrich Wöhler sucessfully isolated Beryllium from Beryllium Chloride.
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#4500 |
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The structure of a Beryllium atom is shown below.
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