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Unformatted text preview: finds that the mass ratio of lead to cadmium is 1.78:1.00. Find the mass percent composition of this alloy. 5. Page 62 of the text lists the masses of the electron, neutron and proton. Using those masses, find the % mass of an F atom (only one isotope exists!) associated with (a) the protons, (b) the neutrons, (c) the nucleus, and (d) the electrons. Compare the total mass you calculate to the measured mass found in the periodic table. 6. Fill in the gaps found in the table below: (you should probably reproduce the table on your homework page!) Unless indicated otherwise, you may assume (1) a neutral species, and (2) that we are looking for abundant species, not isotopes of low abundance/short lifetimes. Name Symbol # protons # neutrons # electrons mass Sodium 2 1 3 1 Na 11 12 11 23 Silicon 37 85 40 K 1+ 126 42 33...
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- Fall '07