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Monday October 28 th , 2013

Monday October 28 th , 2013. Entry Task/Warm-Up Please take your notebook and your homework Due Today: Word Splash and Find that Element Worksheet. Objective: I can identify and construct Bohr and Lewis Structures. Homework: 1. Bohr Structure Practice due Tuesday 10/29/2013 for 20 points.

bradley-mcpherson
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Monday October 28 th , 2013

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  1. Monday October 28th, 2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Word Splash and Find that Element Worksheet Objective: I can identify and construct Bohr and Lewis Structures Homework: 1. Bohr Structure Practice due Tuesday 10/29/2013 for 20 points Schedule: Notes: How to construct a Bohr Structure

  2. Bohr Diagrams Review • Draw a nucleus with the element symbol inside. • Carbon is in the 2nd period, so it has two energy levels, or shells. • Draw the shells around the nucleus. C

  3. Bohr Diagrams Review • Add the electrons. • Carbon has 6 electrons. • The first shell can only hold 2 electrons. C

  4. Bohr Structure • Since you have 2 electrons already drawn, you need to add 4 more. • These go in the 2nd shell. • Add one at a time -starting on the right side and going counter clock-wise. C

  5. Bohr Diagrams Try the following elements on your own: • H • He • O - 8 electrons • Al • Ne • K O

  6. Bohr Diagrams Try the following elements on your own: • H • He • O • Al - 13 electrons • Ne • K Al

  7. Bohr Diagrams Try the following elements on your own: • H • He • O - 8 electrons • Al • Ne • K O

  8. Bohr Diagrams Review • Check your work. • You should have 6 total electrons for Carbon. • Only two electrons can fit in the 1st shell. • The 2nd shell can hold up to 8 electrons. • The 3rd shell can hold 18, but the elements in the first few periods only use 8 electrons. C Complete Atomic Basic Worksheet

  9. Bohr Diagrams Try the following elements on your own: • H • He • O • Al - 13 electrons • Ne • K Al

  10. Tuesday, October 29th, 2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Bohr Structure Practice Objective: I can differentiate between chemical and physical properties Homework: Lewis Structure Practice Wed/Thurs 10/30-10/31 for 27 Points Schedule: Notes: Lewis Structures

  11. Lewis Structures Review • Find out which group (column) your element is in. • This will tell you the number of valence electrons your element has. • You will only draw the valence electrons. www.chem4kids.com

  12. Lewis Structures Review • Write the element symbol. • Carbon is in the 4th group, so it has 4 valence electrons. • Starting at the right, draw 4 electrons, or dots, counter-clockwise around the element symbol. C

  13. Lewis Structures Review • Check your work. • Using your periodic table, check that Carbon is in the 4th group. • You should have 4 total electrons, or dots, drawn in for Carbon. C Complete Lewis Structure Notes Worksheet and Atomic Basic Worksheet SHOW FOR A STAMP WHEN DONE!

  14. Lewis Structures Homework Assignment On a sheet of paper draw Lewis Structures for the following elements: Hydrogen, Barium, Silicon, Neon, Oxygen, Sulfur, Iodine, Magnesium, Aluminum, Potassium, Bromine, Arsenic, Fluorine, Sodium, Calcium, Strontium, Rubidium, Cesium, Xenon, Indium, Tin, Selenium, Tellurium. Draw Bohr Structures for the following elements: Boron, Sulfur, Hydrogen and Magnesium

  15. Wed/Thurs 10/30-10/31/2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Lewis Structure Practice Objective: I can differentiate between chemical and physical properties Homework: Physical vs. Chemical Properties Worksheet due Friday 11/1/2013 for 15 Points Schedule: Notes: Physical and Chemical Changes

  16. Atomic Basics Worksheet!! • You will have 30 minutes in class to complete this assignment. • It will be TURNED IN FOR A GRADE, not on your stamp sheet. • When you are finished, bring it up to Ms. Andrews’ desk and find something quietly to do for the remainder of the time • This assignment is worth 25 points before the end of the hour, if it is not finished, TURN IT IN TORMORROW FOR LATE CREDIT!!

  17. Page 29 Physical Property Characteristic of a pure substance that can be observed WITHOUT changing it into another substance.

  18. Physical Properties of Matter • It does NOT CHANGE into something else • Examples color shape taste state/phase density D = m V

  19. Physical Change • a change in shape, size, color, or state • a change without a change in chemical composition • a change that is reversible • The Mixtures Lab • Examples tearing paper cutting your hair change in state

  20. Page 29 Chemical Property A characteristic of a pure substance that describes its ability to change into a DIFFERENT substance.

  21. Chemical Properties of Matter • changes into a new substance • Examples flammability reactivity with vinegar reactivity with oxygen Iron + Oxygen  Iron oxide (rust) 2Fe + 3O2  Fe2O3

  22. Chemical Change • a change in which a substance becomes another substance having different properties • a change that is not reversible using ordinary physical means • Changes that usually cause heat, sound, light, odor, fizzing/foaming, color changes • Examples combining sulfuric acid and sugar burning a piece of wood soured milk Salt: http://www.schooltube.com/video/2fa9cb3e39064832b31d/Reaction-of-Sodium-and-Chlorine

  23. Chemical or Physical Property? • Paper is white • Boiling point of H2O is 100oC • Zinc reacts with hydrochloric acid and creates hydrogen gas • Nitrogen does not burn • Sulfur smells like rotten eggs Physical Property Physical Property Chemical Property Chemical Property Physical Property

  24. I.S. Learning Goal: • I can describe predict properties of elements and compounds using trends of the periodic table (e.g., metals, non-metals, bonding – ionic/covalent).

  25. Comparing Physical and Chemical Properties

  26. Chemical or Physical Change? • Bending a Paper Clip • Baking a cake • The sublimation of carbon dioxide • Crushing an aluminum can • Vinegar and baking soda combining to create salt and water Physical Change Chemical Change Physical Change Physical Change Chemical Change

  27. Friday 11/8/2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Physical and Chemical Changes Worksheet Objective: I can differentiate between the four states of matter Homework: • Review notes for Quiz on Tuesday 11/5/2013!!! • Matter Crossword Puzzle due Monday 11/4/2013 20 Points • States of Matter Note Page for 10 Points due 11/4/2013 Schedule: Notes: 4 States of Matter Grade Checks

  28. 4 Physical States of Matter • Solid • Liquid • Gas • Plasma

  29. Solid • Particles are tightly compact • Particles vibrate without the ability to move freely • Definite shape and volume • Solid Animation

  30. Liquid • Particles are tightly compact, but able to move around close to each other • No definite shape, but definite volume • Liquid Animation

  31. Gas • Particles can easily spread out or move close together • Particle move freely and with a lot of energy • No definite shape or volume • Gas Simulation

  32. Plasma • Exist at extremely high temperatures (several million degrees Celsius) • Particles are broken apart • Particles move freely and with extremely high energy • This form is not too common on Earth, however it is the most common form of matter in the universe • No definite shape or volume (?) • Examples: Florescent and neon lights, lightning, aurora borealis Why do you think this is the most common form/state of matter in the universe? - + + + - -

  33. States of Matter Diagram http://www.youtube.com/watch?v=vDZhUkp30tE

  34. States of Matter Continuum What about this continuum could be considered a little misleading? Taken from: http://www.chem4kids.com/files/matter_becondensate.html

  35. Mass vs. Weight Mass • a measure of how much matter an object is made of • does not change, regardless of where something or someone is Weight • the force of gravity on an object • equal to the mass of the body times the local acceleration of gravity Why do you think the person’s weight is less on the moon? Mass = 59 kg Mass = 59 kg Weight = 579 N Weight = 96 N http://www.exploratorium.edu/ronh/weight/index.html

  36. Density • a measure of the amount of matter present in a given volume of a substance • typically expressed in the following units: • grams per cubic centimeter (g/cm3) for solids • grams per milliliter (g/ml) for liquids • can change as temperature and pressure change Which do you think is more dense? Why?

  37. . m = D V The Density Triangle D = m V V = m D m . D V

  38. Calculating Density • Density can be calculated by dividing the mass of an object by its volume Sample Problem Timothy found a solid metal block that has a mass of 100 grams and a volume of 25 cm3. What would be the density of the block? D = m V 4 grams cm3 100 grams D = = 25 cm3

  39. Practice Problems • Find the density of a substance with a mass of 27 g and a volume of 7 cm3. 2. A block of maple has a mass of 20 grams and a volume of 26.5 cm3. What is the density of the block? D = m V 3.86 grams cm3 27 g D = = 7 cm3 0.75 grams cm3 20 grams D = m V D = = 26.5 cm3

  40. Monday 11/4/2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Nothing due Today!! Objective: I can differentiate between the different states of matter Homework: Review notes for Quiz TOMORROW Tuesday 11/5/2013!!! Lewis Structure due Tuesday 11/5/2013 for 20 Points Chemistry Web due TODAY 11/5/2013 TURNED IN FOR 35 POINTS Schedule: Review Day!! Activity: Mind Map and Lewis Structure

  41. Tuesday 11/5/2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Lewis Structure Review • Chemistry Web turned in for a late grade of 29/35! Objective: I can differentiate between the different states of matter Homework: • No homework today! • Chemistry Exam Friday 11/15/2013 Schedule: Quiz Today!!

  42. Wed/Thursday 11/6-11/7/2013 Entry Task/Warm-Up • Please take your notebook and your homework Due Today: • Nothing is due today!! Objective: I can differentiate between the different mixtures and solutions Homework: Finish Tasty Solutions Lab Write Up due Today 11/7/2013!!! Schedule: Notes: Solutions and Mixtures Lab: Tasty Solutions

  43. Solvent - Solute - Solution Solvent Part of the solution that is present in largest amount and dissolves a solute What liquid is called the “universal solvent”? WATER

  44. Solute Part of solution present in lesser amount and dissolved by solvent

  45. Solution A well mixed mixture containing a solvent and at least one solute that has the same properties throughout. Tasty solution activity

  46. Page 30 Mixture Made of two or more substances- elements, compounds or both- that are together in the same place but are not chemically combined.

  47. Page 30 Heterogeneous Mixture You can see the different parts

  48. Page 30 Homogeneous Mixture So evenly mixed that you can’t see the different parts

  49. Heat- transfer of energy

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