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[DOCX File]Livingston Public Schools
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2. Two isotopes are known for Element Y. 35.0% of all the atoms of Element Y have an atomic mass of 29.7 amu. 65.0% of the isotopes have an atomic mass of 32.0amu. Find the average atomic mass of Element Y. (29.7amu)(35) + (32.0amu)(65) = 31.20amu. 100. 3. Element Z has three isotopes. The atomic mass and abundance of each is given below.
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[DOC File]Average Atomic Mass Worksheet - HUBBARD'S CHEMISTRY
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The term “average atomic mass” is a _____average, and so is calculated differently from a “normal” average. 2. The element copper has naturally occurring isotopes with mass numbers of 63 and 65. The relative abundance and atomic masses are 69.2% and 30.8% respectively. Calculate the average atomic mass of copper.
average atomic mass worksheet

[DOC File]CHEMISTRY LAB: ISOTOPES AND ATOMIC MASS
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The weighted average takes into account both the mass and relative abundance of each isotope as it occurs in nature. Purpose In this lab you will determine the average atomic mass of the fictitious element beaniuim, Bn, from a mixture of three naturally occurring isotopes with different masses.
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[DOC File]Name _______________________________Date ...
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Average Atomic Mass/ Relative Abundance . Boron has two naturally occurring isotopes, boron-10 and boron-11. The actual masses of these isotopes are 10.81 amu and 11.01amu respectively. The relative abundance is 19.8% for B-10 and the remaining percentage belongs to B-11. Calculate the average atomic mass for Boron. 100 – 19.8 = 80.2 %
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[DOC File]STUDY GUIDE - ATOMIC SRTUCTURE/_CLASSIFICATION OF …
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Calculate the average atomic mass for Ne given the following isotopes & their abundance: Neon-20 = 90.92%; Neon-21 = 0.257%; Neon-22 = 8.82%. Study Guide Answer Key. Answer the following questions regarding the discovery of the atom & its parts. A. Identify 3 conclusions of the gold foil experiment. 1-Atom was more than empty space
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[DOC File]Chemistry Midterm Exam Review
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Average Atomic Mass = ([(isotope mass)(percent abundance)] To solve for percent abundance assign the first isotope x and the second isotope equal to 100% - x. There are two naturally occurring isotopes of rubidium: 85Rb, which has a mass of 84.91 amu and 87Rb, which has a mass of 86.92 amu. The atomic mass of rubidium is 85.47 amu.
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[DOC File]Calculating Average Atomic Mass Worksheet Name
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Calculate the average atomic mass of sulfur if 95.00% of all sulfur atoms have a mass of 31.972 amu, 0.76% has a mass of 32.971amu and 4.22% have a mass of 33.967amu. 3. The three isotopes of lead are shown below, each with its percent by mass abundance and the composition of its nucleus.
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[DOC File]Skill Practice 9 - St. Francis Preparatory School
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One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three? (HINT: Look at the periodic table at calcium’s average atomic mass.) Calcium-40. Several isotopes of a certain atom “X” exist. 4.35% of all X atoms have a mass of 39.946 amu.
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[DOCX File]MR. KELLECI'S SCIENCE CLASS
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Look at 3 or 4 other atoms using the simulation. Do any of them have a whole number for atomic mass? MODEL 2: Mix Isotopes. Play with the “Mix Isotopes” tab for a few minutes, then answer the following questions. What are the factors that affect the average atomic mass of a mixture of isotopes?
average atomic mass worksheet key

[DOC File]Chemistry
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KEY Chemistry: Atomic Number and Mass Number. Complete the following chart and answer the questions below. [Atomic # = # Protons] P + N = Mass # Element. Name Atomic. Number Number of. Protons Number of. Neutrons Mass Number carbon 6. 6. 6. 12 oxygen 8 8. 8 16. hydrogen 1. 1. 0. 1 carbon. 6. 6 8. 14 hydrogen 1. 1. 2 3. nitrogen 7. 7
average atomic mass worksheet

Average atomic mass answer key