Suppоse thаt а stаble element with atоmic number 119, named matherium, has been discоvered. The mass spectrum of a pure sample of matherium is shown below. The horizontal axis is labeled Mass (AMU) with four marked intervals numbered in increments of five starting from 285. The vertical axis is labeled percentage abundance with five marked intervals numbered in increments of 25 starting from zero. Three blue bars appear on the graph. The first bar indicates a mass of 294 AMU and a percentage abundance of 31. The second bar indicates a mass of 297 AMU and a percentage abundance of 58. The third bar indicates a mass of 301 AMU with a percentage abundance of 11. How many protons and how many neutrons are in the nucleus of an atom of the most abundant isotope of matherium? Write the ground-state electron configuration of matherium, showing only the valence-shell electrons. Use the mass spectrum to determine the atomic mass that will be reported on the Periodic Table for matherium. Using principles of atomic structure, explain why the matherium has a fairly low first ionization energy, but a relatively high second ionization energy. Below are two photoelectron spectra. Which one represents an element that is in the same family as element matherium? Justify your answer. The horizontal axis is labeled "binding energy per mole electron (MJ)" and has five decreasing intervals numbered 1000, 100, 10, 1, and 0.1. The vertical axis is labeled "number of electrons" and has increasing intervals numbered 1 through 6. There are four peaks on the graph. The first peak is occurs just below 100 MJ and has a height indicating two electrons. The second peak occurs right around 10 MJ and has a height indicating two electrons. The third peak occurs immediately to the right of the second peak and has a height indicating 6 electrons. The fourth peak occurs just after 1 MJ and has a height indicating 2 electrons. The horizontal axis is labeled "binding energy per mole electron (MJ)" and has five decreasing intervals numbered 1000, 100, 10, 1, and 0.1. The vertical axis is labeled "number of electrons" and has increasing intervals numbered 1 through 6. There are four peaks on the graph. The first peak is occurs right around 100 MJ and has a height indicating two electrons. The second peak occurs just above10 MJ and has a height indicating two electrons. The third peak occurs immediately to the right of the second peak and has a height indicating 6 electrons. The fourth peak occurs after 1 MJ and has a height indicating 1 electron.