St. George's College
8th CHEMISTRY Class:
Atomic Properties
Teacher's notes
Objectives
Vocabulary
April 6th
2009
Link and Learn
Prepared by
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8th Milton A ‐ Atomic Calculations Name
Oral Intervention
Coin
Chocolate
Sergio María Fernanda Alejandra Almendra Anna Paula Sandra E‐C Maia María Belén Alfredo Kinley Arianne Sandra M. Fiorella Rodrigo Giulia Jaime Stefano Bruno
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8th Milton Alpha ‐ Atomic Calculations Name
Oral Intervention
Coin
Chocolate
Marcelo Antonella Paulo Alejandro Brenda Diego Gabriel Valeria Cristina Giuliana Joshua María Gracia Gonzalo N. Paolo Gonzalo R. Giorgio Nicolás María Claudia
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ATOMIC CALCULATIONS 4
Problem 1 Chromium exists in four isotopic forms. The atomic masses and percent occurrences of these isotopes are listed in the following table: Isotopic Mass (amu)
Isotopic Mass (amu)
50
4.31%
52
83.76%
53
9.55%
54
2.38%
Calculate the average atomic mass of chromium.
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More Problems Calculate the atomic mass of the following elements according to the occurrence of their isotopes: 1. 1H (99.985%) ‐ 2H (0.015%) 2. 6Li (7.42%) ‐ 7Li (92.58%) 3. 10B (19.78%) ‐ 11B (80.22%) 4. 35Cl (75.53%) ‐ 37Cl (24.47%) 5. 35Ar (0.337%) ‐ 38Ar (0.063%) ‐ 40Ar (99.6%)
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Elemental Jeopardy
Click Here
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Teacher's Notes This class has been designed to cover the topics of Atomic Calculations for the week of Monday April 13th till Wednesday April 17th. For further knowledge about this topic: 1. Conduct a thorough search under the topic: Atomic Calculations on the Web, books and magazines. 2. If findings are not specific, ask your teacher for suggestions.
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Objectives • Carry out mathematical calculations in chemistry, with emphasis in atomic masses.
Note: All, or most, of the objectives will be covered during class time, however the student must be responsible for those objectives not covered or concluded.
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Vocabulary • Atom: the smallest unit of an element that still has the properties of that element. • Proton: a subatomic particle that has positive electric charge. • Nucleus: the control center of a cell that directs the cell's activities. The center of an atom, usually made of protons and neutrons. • Neutron: a subatomic particle that has the same mass as a proton but no electric charge. • Electron: a subatomic particle that orbits an atom's nucleus, has a negative electric charge, and has very little mass. • Atomic Number: the number of protons in an atom. • Element: a substance made up of only one kind of element. • Metal: a substance that conducts heat and electricity well and is malleable. • Nonmetal: a substance that does not conduct electricity and is not malleable. • Proton: a subatomic particle that has a positive electric charge. • Periodic Table: a table that shows the elements arranged by their atomic numbers. • Compound: a substance made up of atoms of two or more elements that are chemically combined. • Melting Point: the temperature at which a substance changes from a solid to a liquid. • Boiling Point: the temperature at which a substance changes from a liquid to a gas. • Plasma: a state of matter made up of charged atoms, uncharged atoms, and free electrons.
Note: Most of the vocabulary words will be covered during class time, however the student must be responsible for those words not covered or concluded.
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Link and Learn You can visit the following websites to improve your understanding on the present topic: • • • • •
http://www.creation‐science‐prophecy.com/C14a.htm http://science‐learning2009.wikispaces.com http://learningandscience.blogspot.com www.sanjorge.edu.pe http://libraryatstgeorges.blogspot.com
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Resources Used Slide
Resource
Description
Origin
G1 ‐ 2 Image
John Milton
http://bit.ly/QAYb
G1 ‐ 4 Image
Atoms
http://bit.ly/BqTh
G1 ‐ 7 Images
Helium Isotopes Carbon 14 Isotopes
http://bit.ly/Hhz7Z http://bit.ly/10rlfM
G1 ‐ 8 Image
Carbon 14 formation
http://bit.ly/MSA0V
G1 ‐ 9 Animation Periodic Table
Notebook Gallery
G1 ‐ 10 Images
Carbon ‐ Nitrogen reaction http://bit.ly/MSA0V http://bit.ly/2pNa39 Beta decay 1 http://bit.ly/13Rciv Beta decay 2
G1 ‐ 11 Images
Carbon 14 to Nitrogen 14‐1 http://bit.ly/h7Cxr Carbon 14 to Nitrogen 14‐2
E‐Portfolio G1 ‐ 12 Images Animation Puzzle pieces Copy and Paste Idea
http://bit.ly/W7ccA http://bit.ly/Dbbtf http://bit.ly/2ZxTj Notebook Gallery
G1 ‐ 14 Image
http://bit.ly/OPIoM
Glucose
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Prepared by
Gerardo LAZARO Science Lead Teacher Email: glazaro@sanjorge.edu.pe Wiki: http://science‐learning2009.wikispaces.com Blog: http://learningandscience.blogspot.com Twitter: http://twitter.com/glazaro
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Attachments
Elemental Jeopardy 3 people.ppt