For the element lead Pb please answer the questions and be specific:   1. Write its proper chemical symbol, list all it's isotopes and their natural abundances, and run the Atomic Mass calculation to see if all is accounted for. Did it work out? Did you get the number on the Periodic Table? Comment on it's accuracy.   2. If there are radio-isotopes (unstable ones) list them and their half-lives. a) Make a table for all isotopes (radio and stable), and list the number of protons, neutrons, and electrons in each. b) Write out the full electron configuration.   3. Discuss any interesting observations.

Write the nuclide notation, including charge if applicable, for atoms with the following characteristics: (a) 25 protons, 20 neutrons, 24 electrons. (b) 45 protons, 24 neutrons, 43 electrons. (c) 53 protons, 89 neutrons, 54 electrons. (d) 97 protons, 146 neutrons, 97 electrons

How did the charge distribution in the plum pudding model affect alpha particles passing through an atom?

An average atomic nucleus has a diameter of about m.