What is the atomic weight of lead?

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Study for the US EPA Model Lead Inspector Test. Use flashcards and multiple-choice questions with hints and explanations for comprehensive preparation. Get exam-ready with ease!

Multiple Choice

What is the atomic weight of lead?

Explanation:
Atomic weight is the weighted average mass of an element’s natural isotopes, expressed in atomic mass units. Lead has several isotopes (such as Pb-206, Pb-207, Pb-208) with abundances that combine to about 207.2 amu. The value 207.19 amu matches this standard average for lead, making it the correct choice. The other numbers don’t reflect lead’s natural isotopic composition or its average mass.

Atomic weight is the weighted average mass of an element’s natural isotopes, expressed in atomic mass units. Lead has several isotopes (such as Pb-206, Pb-207, Pb-208) with abundances that combine to about 207.2 amu. The value 207.19 amu matches this standard average for lead, making it the correct choice. The other numbers don’t reflect lead’s natural isotopic composition or its average mass.

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