Download Study Guide Chapter 3 ATOMIC STRUCTURE 3.1, 3.2, 3.3

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NAME __________________________________________________________ PER ______
Study Guide Chapter 3 ATOMIC STRUCTURE 3.1, 3.2, 3.3
1.What are the parts of part of Dalton’s atomic theory?
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2. What is an isotope? _______________________________________________________________________________
3. What is the difference between the atomic number and atomic mass? ______________________________________
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4. fill out the chart below
Particle
Mass
Charge
Location
Proton
Neutron
Electron
5. What is the mass number of an atom with 53 protons, 54 electrons, and 76 neutrons ? ______
6. Explain why the atomic mass of thallium is 204.38
Thallium has 2 isotopes, 203Tl and 205Tl. ________________________________________________________________
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7. An Atom of elements with a different number protons than electrons is called a(n) _____________________________
8.What is the mass number for this atom? _______________
What is this element? ___________________________________
9. What is percent abundance ? _______________________________________________________________________
Look at the model to the left, how would this atom differ from 14C?
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10.
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11. Consider an element Z that has two naturally occurring isotopes with the following percent abundances: the isotope
with a mass number of 41.00 is 22.50% abundant; the isotope with a mass number of 43.00 is 77.50% of abundant. What
is the average atomic mass (amu) for element Z?
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12. The relative masses in AMU for all elements are compared to which element? ______________________________
13. What is the total number of protons and neutrons in an atom of 127 Te
52 ________________________________________________________________
14.How is an ion formed from an atom of an element? ____________________________________________________
15. How are these 3 isotopes of oxygen different O16, O17, O18 ____________________________________________
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16. The mass of 3 isotopes of an element were recorded.
Total mass (amu)
Number of atoms
Percent abundance
Isotope #1
319.720
10
96.24
Isotope #2
659.420
20
0.76
Isotope #3
3496.700
100
3.00
What is the atomic mass of the element? _________________________________________________
Write the word, ion, isotope, or atom(s) for each of the following.
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17. a. Mg2+_________________________________ b.
C , 12C _________________________________
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c.
15
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N, 15O____________________________
d.
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N-3 ____________________________________
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18. The net charge on a particle that consists of 12 protons, 11 neutrons and 10 electrons is __________
19.The identity of an element is determined by the number of ___________________________________
20. An atom of any electrically neutral element must have the same number of _________ & _____________
20. Use the periodic table and look up Ca. Write the
number of protons, neutrons, and electrons.
P________N________E_________
Draw the atom of Ca. Label all parts.
21. Use the periodic table to look up Fluorine. Write the
number of protons, neutrons, and electrons.
P________N________E_________ Draw the diagram for
the F- ion. Label all parts.
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