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Unit 2 ( Isotopes Problem Set 2-2 1. Which of the spare-time activity ar isotopes of element X, with nuclear number of 9: [pic],[pic],[pic], and [pic]. 2. For to each unitary of the following isotopes, write the nuclear symbols: a. Cu-63, Cu 65 b. C-12, C-14 c. Mg-24, Mg-25, Mg-26 d. Ne-20, Ne-21, Ne-22 3. operate that the nuclear draw of magnesium is 24.31 amu, given the following teaching: [pic], circle = 23.985042 amu; share copiousness = 78.99% [pic], mass = 24.985837 amu; part abundance = 10.00% [pic], mass = 25.982593 amu; percentage abundance = 11.01% 4. Naturally occurring neon is a mixture of ternary isotopes with the following multitude and abundances: rush NumberAtomic cumulus% Abundance 2019.9990.51 2120.99 0.27 2221.99 9.22 Calculate the atomic mass of naturally occurring neon. 5. due north has ii naturally occurring isotopes N-1 4 and N-15, whose atomic masses are 14.0031 and 15.00001, respectively. The atomic mass of nitrogen is 14.0067. What are the percentages of each of the isotopes? 6. Copper has two stable isotopes,[pic]and [pic], with masses of 62.939598 amu and 64.927793 amu, respectively.

Calculate the percent abundances of these isotopes of copper. 7. Chromium has quad naturally occurring isotopes: chromium 50 (4.35% at 49.946 amu) chromium 52 (83.79% at 51.941 amu) chromium 53 (9.50% at 52.941 amu), and chromium 54 (2.36% at 53.939 amu) Calculate the ave rage atomic mass of chromium. 8. i! n that respect are two naturally occurring isotopes of atomic number 35: Br-79 (78.918 amu) and Br-81 (80.916 amu. What is the percentage of each isotope? 9. There are two isotope of outfit: V-50 (49.947 amu) and V-51 (50.944 amu). What is the percent abundance of each isotope?If you want to get a full essay, order it on our website: BestEssayCheap.com

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