Problem: If there are 128 neutrons in Pb-210, how many neutrons are found in the nucleus of Pb-206?

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We are being asked how many neutrons are found in the nucleus of Pb-206.

  • Pb-210 and Pb-206 are isotopes of Lead (Pb).
  • 210 and 206 are the mass numbers (A)
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Problem Details

If there are 128 neutrons in Pb-210, how many neutrons are found in the nucleus of Pb-206?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Isotopes concept. You can view video lessons to learn Isotopes. Or if you need more Isotopes practice, you can also practice Isotopes practice problems.

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Based on our data, we think this problem is relevant for Professor Santra's class at UCF.