Atomic and mass number practice

• [DOCX File]Protons, Neutrons, and Electrons Practice Worksheet

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  Feb 03, 2016 · The atomic mass is also different for every element, and also for isotopes of the same element. The atomic mass is equal to the number of protons that an element has plus the number of neutrons that an element has. This is because protons have a mass of approximately 1 amu (atomic mass unit) and neutrons have a mass of approximately 1 amu.

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• [DOC File]Atomic Theory Exam - Geneseo

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  23) An element has two isotopes. 90% of the isotopes have a mass number of 20 amu, while 10% have a mass number of 22 amu. Calculate the atomic mass of the element. Show all work with units. (3 pts.) 24) Complete the chart below: (9 pts.) Substance Atom or Ion? # protons # neutrons # electrons Atomic # Mass number Mg+2. Rb. Cl-

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• Unit 2 Exam PRACTICE: Atomic Structure and the Periodic ...

  Unit 2 Exam PRACTICE: Atomic Structure and the Periodic Table (107 pts.) ... Standard: Describe the information provided by the atomic number and the mass number. (ME1Ec) ____ 1. What is the atomic number of the atom that has 11 protons, 11 electrons and . …

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• [DOC File]Accelerated Chemistry Chapter 3 Wksht # 1

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  atomic mass number 37 35 88 90 Periodic Table Box. 23Na+1 14N-3 17O-2 # protons 20 11 7 8 # neutrons 20 12 7 9 # electrons 18 10 10 10 atomic mass number 40 23 14 17 3. Calculate the average atomic mass if element X has two isotopes: 28X (mass = 27.98 amu, % abundance = 92.23 %), and 29X (mass = 28.98 amu, % abundance = 7.770 %). _

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• [DOC File]Atomic Numbers Practice #1

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  Element Nuc. symbol Electrons Protons Neutrons Isotope Symbol Atomic Number Mass Number Xenon 133 Iodine 73 50 70 79 200 80 200 11 11 8) Copper has 2 main isotopes, Cu-63 and Cu-65. Look up copper's atomic mass on the periodic table.

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• [DOC File]Protons, Neutrons, and Electrons Practice Worksheet

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  Atomic. symbol Atomic. number Protons. Neutrons. Electrons. Atomic. mass B 6 11 24 31 37 39 89 29 35 43 100 Pb 207 102 70 89 225 Mo 53 81 206 100 159 No 261 Yb 172 106 159 Solutions for the Protons, Neutrons, and Electrons Practice Worksheet: Atomic. symbol Atomic. number Protons. Neutrons

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