What is the atomic weight of lead?

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Prepare for the US EPA Model Lead Inspector Test. Study with flashcards and multiple choice questions. Each question includes hints and explanations for better understanding. Ace your exam!

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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