This question is about atomic structure.
Define the term mass number of an atom.
Complete the table below to show the numbers of neutrons and electrons in the species shown.
| Species | Number of protons | Number of neutrons | Number of electrons |
|---|---|---|---|
| 206Pb^{206}\text{Pb}206Pb | 82 | ||
| 208Pb4+^{208}\text{Pb}^{4+}208Pb4+ | 82 |
A sample of lead contains four stable isotopes: 204Pb^{204}\text{Pb}204Pb, 206Pb^{206}\text{Pb}206Pb, 207Pb^{207}\text{Pb}207Pb, and 208Pb^{208}\text{Pb}208Pb. This sample has a relative atomic mass of 207.3. In this sample, the ratio of the abundance of isotopes 204Pb^{204}\text{Pb}204Pb, 206Pb^{206}\text{Pb}206Pb, and 207Pb^{207}\text{Pb}207Pb is 1:15:161:15:161:15:16.
Calculate the percentage abundance of 206Pb^{206}\text{Pb}206Pb in this sample.