10.7 Chapter 4 - COURSE WORK homework PDF

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COURSE WORK homework...

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NAME:____________________________________

10.7.20

1) Write the isotopic symbols for each isotope in the form AZX a) Cobalt – 20

b) Iodine – 131

c) Plutonium – 244

2) Determine the number of protons and neutrons in each isotope. a)

23 11 Na

#protons_____

#neutrons_____

b)

266 88Ra

#protons_____

#neutrons_____

c)

14 7N

#protons_____

#neutrons_____

3) Write the isotopic symbols in the form X-A for each isotope. a) The argon isotope with 22 neutrons

b) The phosphorus isotope with 16 neutrons

4) Rubidium has two naturally occurring isotopes: Rb-85 with a mass of 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with a mass of 86.9092 amu and a natural abundance of 27.83%. Calculate the atomic mass of rubidium. Use the table to organize your given information and SHOW ALL WORK...