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Atoms and elements

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					      Atoms and elements




Sunday, 19 August 2012     1
                                     Index
   Lesson 1: An introduction to elements, compounds and reactions.
   Homework task 1
   Lesson 2: Elements ~ the building blocks of matter.
   Homework task 2
   Lesson 3: Let’s find out more about an element.
   Homework task 3
   Lesson 4: There are only 100 different elements, how do we get all the other
    materials?
   Homework task 5
   Lesson 5: What’s the difference between a compound and a mixture?
   Homework task 5
   Lesson 6: Using reactions to make new compounds.
   Lesson 7: Separating a mixture
   Lesson 8: Assessment




Sunday, 19 August 2012                                                             2
           An introduction to elements, compounds and reactions

                          LESSON 1


Sunday, 19 August 2012                                            3
                         Equipment
Equipment for 8 groups
 Transformers
 Croc leads
 Spatulas (2 per group)
 Copper sulphate solution (liquid)
 Test tube racks
 Test tubes (2 per group)
 Vinegar
 Baking powder




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                    Lesson objectives
 To learn how chemical reactions make
   something new and different.




Sunday, 19 August 2012                   5
             Making something new
A   reaction between vinegar and baking
   powder.




Sunday, 19 August 2012                     6
   Electrolysis of copper sulphate
Links:
BBC Bitesize




Sunday, 19 August 2012               7
                         Lesson 2
                The building blocks of matter




Sunday, 19 August 2012                          8
                         Equipment
   CD ROM: Reactions between alkali metals and
    water
   DVD: Curriculum bites ~ Wan2Tlk Science
   Materials kit
   A4 copies of periodic table
   Various elements to show (whatever is possible
    from this list: copper, sulphur, carbon, oxygen in
    gas bottle, chrome & tin)


Sunday, 19 August 2012                                   9
                         Getting started...
 Video: Reactions between alkali metals
   and water.




Sunday, 19 August 2012                        10
                         Objective
Begin to get the idea that
 everything is made from basic
 materials called elements.




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                         Input
 See this again: Reactions with alkali metals
  (CD ROM)
 Using whiteboards in pairs:
        Can you remember the names of the metals?
        After the reaction, what do YOU think was left?
 See        some elements and discuss.



Sunday, 19 August 2012                                12
                         Starter
 Everything  we know about is made of
  basic substances called elements.
 Elements are substances that are not
  joined with something else to make
  something different.
 Work in a group to make a list on a
  whiteboard of substances you think might
  be elements.

Sunday, 19 August 2012                       13
                                    1. Each group to suggest one
                                       element from their list. Do we
                                       agree?
                                    2. Video input:
Atoms, molecules

                                        • Wan2Tlk Science/ Chemistry/
                   PERIODIC TABLE         Atoms
                                        • Wan2Tlk Science/ Molecules
and elements.


                                          and elements
                                    3. Let’s have a look at the
                                        INTERACTIVE PERIODIC
                                        TABLE




 Sunday, 19 August 2012                                            14
                                Links
 Sheffield              Hallam University




Sunday, 19 August 2012                       15
   Activity: Elements and non-elements

 Work   in a group. Use a materials kit.
 Which materials in this kit are elements?
 Divide the materials into two groups.
 List or draw in your book (elements),
  (non-elements).

                         ELEMENTS   NON ELEMENTS




Sunday, 19 August 2012                             16
                         And finally
 Work in pairs with a whiteboard.
 Copy and complete the following
  sentence:
        Elements are substances that...




Sunday, 19 August 2012                     17
     Lesson 3: Let’s find out
     more about an element
                    Research & presentation




Sunday, 19 August 2012                        18
                         Equipment
 Colour photographs           A short length of
  of elements.                  magnesium ribbon
 Books about                  Hoffman Voltameter
  materials and
  chemistry.
 A4 copies of the
  periodic table (quality
  prints)
 Glue, scissors &
  paper.
Sunday, 19 August 2012                               19
                         Starter...
 What’s water made
  from?
 Can we split it up into
  hydrogen and
  oxygen?
 Demonstration of
  Hoffman voltameter.




Sunday, 19 August 2012                20
                         Objective
 To  find out more about the properties of
   one element.




Sunday, 19 August 2012                        21
To find out more about the properties of one element.


            Important scientific words.
                  What do you think they mean?
     element
     raw materials
     state at room temperature
     symbol




    Sunday, 19 August 2012                              22
To find out more about the properties of one element.


             What your group will do...
     ...youare going to make a presentation
      about one element.
     This could be:
            A wall display using cut-outs, photographs
             and diagrams.
            A PowerPoint presentation.
            Something else.
     DEADLINE:               by ....

    Sunday, 19 August 2012                                23
        Research questions you might
                   ask...
   What    does this element look like?
   What uses does it have to us?
   What is its state at room temperature?
   What is its symbol?
   Is it a metal or a non-metal?
   Where is it on the periodic table?
   Anything else?
                         To find out more about the properties of one element.
Sunday, 19 August 2012                                                  24
To find out more about the properties of
one element.




                             Presentations
                Each group to present their work
                and clearly state what they found
                               out.


    Sunday, 19 August 2012                          25
To find out more about the properties of one element.


                             True or false?
                                                        TRUE   FALSE
    There are more non-elements than elements
    An apple is an element
    Very few elements are liquids at room
    temperature
    All gases are elements
    Water is an element: it is made of hydrogen and
    oxygen atoms
    Calcium is a metal




    Sunday, 19 August 2012                                             26
                         Lesson 4
          There are only 100 different
          elements, how do we get all the
          other materials?


Sunday, 19 August 2012                      27
                         Equipment
 Worksheet:   ‘Lesson 4, worksheet 1’
 Daydream interactive whiteboard charts.
  CD ROM
 Copies of the periodic table
 Homework sheet
 Iron filings
 100 cm3 beakers (one per pair)
 Test tubes (one per pair)
Sunday, 19 August 2012                      28
                         Getting started




Sunday, 19 August 2012                     29
                 Elements & symbols
   Do you know what       C
    these elements are?    H
    Work in pairs on       Fe
    whiteboards.           O
                           He
                           Cu
                           Pb
                           Ca
                           Zn
                           Ag


Sunday, 19 August 2012                30
                         Objectives
 New  materials are formed when atoms join
  together.
 Discover what compounds are.




Sunday, 19 August 2012                    31
New materials are formed when atoms join together.
Discover what compounds are.


                             Introduction

     Daydream   interactive whiteboard
       charts. CD ROM: / materials & their
       properties / periodic table




    Sunday, 19 August 2012                           32
New materials are formed when atoms join together.
Discover what compounds are.

                             A challenge...
     Part 1: Work in pairs.
     All materials consist of elements.
      Sometimes materials are pure. Sometimes
      materials are made of more than one
      element combined.
     Use the worksheet to decide what each of
      the materials is made from.
     Link to worksheet

    Sunday, 19 August 2012                           33
New materials are formed when atoms join together.
Discover what compounds are.

                                Answers
       Carbon dioxide        Carbon and oxygen
       Iron oxide (rust)     Iron and oxygen
       Copper Sulphate       Copper, sulphur and oxygen
       Table salt            Sodium and chlorine
       Chlorine              Just chlorine ~ it’s an element
       Gold                  Jut gold ~ it’s an element
       Water                 Hydrogen and oxygen
       Copper oxide          Copper and oxygen
       Hydrocarbons          Hydrogen, oxygen and carbon
       Carbohydrates         Carbon, hydrogen and oxygen

    Score out of ten please

    Sunday, 19 August 2012                                      34
New materials are formed when atoms join together.
Discover what compounds are.



                             Video input
    BBC CLASS CLIPS 1: Atoms & elements
    1. Art. Why is air not an element?
    2. Wan2TlkScience. What can you say
       about all the atoms in an element?
    3. Amazing materials. What are the
       properties and uses of gold?


    Sunday, 19 August 2012                           35
Sunday, 19 August 2012



                            Challenge 2
      Part  2 (on the worksheet): Work in a
       different pair.
      Work out the chemical symbols or
       formulae for the following:




New materials are formed when atoms join together.
                                                     36
Discover what compounds are.
New materials are formed when atoms join together.
Discover what compounds are.

                                Answers

    Carbon dioxide                      CO2

    Iron oxide                          Fe203

    Iron sulphide                       FeS

    Copper Sulphate                     CuSO4

    Table salt                          NaCl

    Chlorine                            Cl

    Gold                                Au

    Water                               H20
                                                     Scores
                                                     out of 9
    Sunday, 19 August 2012                                      37
New materials are formed when atoms join together.
Discover what compounds are.

                             Some basics
       Elements are made of one type of particle. All
        the atoms are the same.
       There are about 100 different elements.
       Compounds are materials that are made of one
        or more different elements combined.
       The elements in compounds are chemically
        combined. A compound is completely different to
        the elements it is made from.
       Your task is to write everything you know about
        elements and compounds.
    Sunday, 19 August 2012                           38
                 Task and homework
 Your task is to write everything you know
  about elements and compounds.
 Work in pairs ~ draft on whiteboards.
 Transfer to exercise books and complete
  at home.
 Don’t forget to revise section 6 of the
  Revision Guide.


Sunday, 19 August 2012                        39
                         Lesson 5
            What’s the difference between a
              compound and a mixture?



Sunday, 19 August 2012                        40
                            Equipment
For demonstration
        DVD: BBC class clips 1
        Magnesium ribbon
        Matches
For students in groups
        Chromatography: white blotting paper, berol felt pens, paper clips, large
         glass beakers (500 cm3)
        Filtering: filter paper, funnels, calcium carbonate (chalk) powder
        Evaporation: Bunsen burners, burning tins, tripods, salt, 100 cm³




Sunday, 19 August 2012                                                          41
                         Objectives
 What’s the difference between a mixture
  and a compound?
 Can you use words and diagrams to
  explain?




Sunday, 19 August 2012                      42
                         Getting started
 Check what’s happened in your iron filings
  experiment
 Demonstration of burning magnesium




Sunday, 19 August 2012                     43
                           Follow up
 Explaining             the products of combustion.




Sunday, 19 August 2012                                 44
                         Video input
 BBC     CLASS CLIPS 1 / Compounds and
     mixtures /
1. Elements and compounds. What is the main
   difference between an element and a mixture?
2. Elements and compounds. What are the
   elements formed in these two experiments?
3. Elements and compounds. What do we call
   atoms when they join together?


Sunday, 19 August 2012                            45
               What is a compound?
 Ideas on whiteboards.
 Class discussion.




Sunday, 19 August 2012               46
 Let’s investigate some mixtures
 Chromatography
        Can we separate the dyes in the ink?
 Filtering
        Can we separate the chalk from the water?
 Evaporation
        Can we separate the salt from the water?
         are easily separated.
 Mixtures
   Compounds are not!

Sunday, 19 August 2012                               47
                Answers that explain
 Today,   we looked at the difference
  between compounds and mixtures.
 Your suggestions please.
 Draft some writing to explain the difference
  between a mixture and a compound. Work
  directly in your exercise book.
 Homework: Complete your explanation.



Sunday, 19 August 2012                      48
                         Lesson 6
             Moving elements around: Using
                 reactions to make new
                      compounds.


Sunday, 19 August 2012                       49
                                 Equipment
For demonstration
        copper oxide
        dilute sulphuric acid
        magnesium ribbon
        matches
        Candle
For students
        Candles (one per group)
        Tall glass jars (gas jars or measuring cylinders)
        Large glass beakers or water baths




Sunday, 19 August 2012                                       50
               Objectives
 Learn more about how substances react to
  make new substances.
 Prove that burning is a reaction that uses
  a gas from the air.

For example:
 Sulphuric acid reacts with copper oxide to
  make…
Learn more about how substances react to make new substances.
Prove that burning is a reaction that uses a gas from the air.


                             Demonstrations
     Copper  oxide and dilute sulphuric acid.
     Oxidising magnesium.
     Burning a candle to change water level.
     Demo first, then you can try it.
     Oxidising iron to change water level.
     Demo first, then you can try it.




    Sunday, 19 August 2012                                       52
                           Plenary
   Reporting back in groups
   Group 1: What was the blue stuff in the conical flask called?
   Group 2: Why did the copper oxide and sulphuric acid turn blue?
   Group 3: What was the white powder that was left after the
    magnesium burned?
   Group 4: Why was there a lot of white powder left after the
    magnesium burned?
   Group 5: What gas was used from the air when the candle burned
    and what is its chemical formula?
   Group 6: Why did the water level rise when the candle was burning?
   Group 7: What new substance is formed when iron rusts?
   Group : Why do we expect the water level to rise when the iron
    rusts?

Sunday, 19 August 2012                                              53
                           Lesson 7
                         Separating a mixture




Sunday, 19 August 2012                          54
                             Equipment
For demonstration               For students to use in groups
 Copper sulphate solution      Dry sand
 Bunsen burner                 Electronic scales
 Tripod                        Dry table salt
 Burning dish                  Bunsen burners
 matches                       Burning tins (not too rusty)
                                Magnets
                                Eye protection
                                Measuring cylinders
                                Filter paper




Sunday, 19 August 2012                                          55
                         Getting started
 Demonstration.
 Can  I separate the blue copper sulphate
   from the water?




Sunday, 19 August 2012                       56
                         Practical
 Challenge:    Separating a mixture of sand,
   salt & iron filings.




Sunday, 19 August 2012                          57
                         Plenary
 Allgroups to prepare feedback.
 What did you do at each stage of the
  process?
 Why did you do that at each stage?




Sunday, 19 August 2012                   58
                         Assessment



Sunday, 19 August 2012                59

				
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