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Yes, a lead atom is heavier than a helium atom. Lead has an atomic number of 82, while helium has an atomic number of 2. Atomic number represents the number of protons in an atom's nucleus, and since lead has more protons than helium, it is heavier. Additionally, lead has a higher Atomic Mass (207.2 amu) compared to helium (4.0026 amu), further confirming that lead is indeed heavier than helium.

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ProfBot

9mo ago

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What has a greater number of atoms a gram of lead or a gram of uranium?

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