A primary goal of medievel alchemists was to turn base metals in gold. Typically they worked with lead as the starting metal, since it was heavy, cheap, and readily available. The nucleus of the most abundant isotope of gold has 118 neutrons and 79 protons. The most abundant isotope of lead has a nucleus with 126 neutrons and 82 protons. a) Write the formulas for these isotopes of gold and lead. Use the format: MassNumber_ElementalSymbol_AtomicNumber (e.g., for the isotope of mercury with 122 neutrons and 80 protons, you would write that as: 202_Hg_80) b) If you were a very advanced medieval alchemist and could remove individual protons and neutrons from the lead isotope described above to make the gold isotope, write the symbol for the isotope you removed from lead to turn it into gold.

A cylindrical piece of pure titanium (Ti, density=4.506 g/cm^3) has diameter d=1.15 cm and length L=153 mm. How many atoms of titanium are in the cylinder? Use 47.87 g/mol for the average atomic mass of naturally occurring Ti. volume of cylinder=pie d^2L/4 Avogadro's number=6.022 x 10^23

Antimony has two naturally occuring isotopes, 12 Sb and 123Sb. 12'Sb has an atomic mass of 120.9038 u, and 123Sb has an atomic mass of 122.9042 u. Antimony has an average atomic mass of 121.7601 u. What is the percent natural abundance of each isotope? 121 Sb: % 123 Sb:

The element zirconium has five naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. Show your work to determine the average atomic mass. Isotope           Mass %           Abundance Zr-90              89.9043             51.40 Zr-91             90.9053              11.20 Zr-92             91.9046               17.10 Zr-94             93.9061              17.50 Zr-96            95.9082                   2.80

An unmanned space shuttle mission brings samples back to Earth from Mars.  Working with samples from mars, you discover that the isotope abundances on Mars are different from on Earth.  You are tasked with calculating the average atomic mass (weight) of nitrogen that exists naturally on Mars.  You find that the abundance of nitrogen-15 (atomic mass of  15.000 amu) on Mars is 11.639%, and the rest of the nitrogen (abundance = 100% - 11.639%) is nitrogen-14 (atomic mass 14.003 amu).  Using that information, what is the average atomic mass (in amu) of nitrogen on Mars? (answer should have 3 decimal places - only input numbers, not "amu")

engine.html?ClassID=984223440 How many isotopes are represented for the element in this mass spectrum? Unknown Element Relative Abundance 1001 50 81 83 85 87 89 Mass (M/e) There are [?] stable isotopes. ational Academy of Science. All Rights Reserved. O 9 Enter

The planet Zoltan is located in a solar system in the Andromeda galaxy. On Zoltan, the standard unit for the amount of substance is the wog and the standard unit for mass is the wibble. The Zoltanians, like us, chose carbon-12 to define their standard unit for the amount of substance. By definition, one wog of C-12 atoms contains 2.50 x 1021 atoms. It has a mass of exactly 12 wibbles. What is the mass, in wibbles, of 1 wog of nitrogen atoms? What is the mass, in wibbles, of 5.00 x 10-1 wogs of O2? What is the mass, in grams of 1 wog of hydrogen atoms?   Expert Solution

Chromium which has an average atomic mass of 51.9961 amu has four isotopes. The masses of its isotopes are 49.94605 amu, 51.94051 amu, 52.94065 amu and 53.93888 amu. The first two isotopes have a total abundance of 87.87% and the last isotope has an abundance of 2.365%. What is the abundance of the third isotope? Answer text

A new element is discovered and has three stable isotopes. The atomic weight of the element is 269.7374 amu. Isotope X-268 has a measured mass of 267.9086 amu and an abundance of exactly 0.2 (infinite sig figs) Isotope X-272 has a measured mass of 271.8937 amu and an abundance of exactly 0.45 (infinite sig figs)   What is the mass (in amu) of the other isotope?   Report to the ten thousands place (4 decimal places)

Please do this chemistry work