UNIT 2:%ATOMS,%ELEMENTS%...

UNIT  2:  ATOMS,  ELEMENTS  AND  COMPOUNDS

LAB  SAFETY

LAB  SAFETY

Making  WHMIS  Workhttp://www.youtube.com/watch?v=R7hIUhXnG-­Q#t=25

Lab  Techniques  &  Safety:  Crash  Course  Chemistry  #21  https://www.youtube.com/watch?v=VRWRmIEHr3A

Chemistry  Lab  Safety  Videohttp://www.youtube.com/watch?v=3ELbwzqyuhs

Lab  Safetyhttp://www.youtube.com/watch?v=cr7roogzM8c

Accident  at  Jefferson  Highhttp://www.youtube.com/watch?v=PxyDImUYo14

(Pearl  Harbour,  Hawaii)  Sunken  USS  Arizona  shows  signs  of  rust.

Chapter  4  Properties  of  Elements  and  Compounds  

(Page  136-­175)

4.1  Studying  Matter

Toronto  propane  explosion

Learning  Goals

• I  can  use  WHMIS  symbols  and  safety  icons  to  operate  safely  in  the  science  classroom.

• I  can  use  the  particle  theory  to  explain  how  matter  is  classified.

• I  can  explain  how  to  separate  mixtures.• I  can  discuss  important  issues  related  to  the  use  of  chemicals  by  humans.

4.1  Studying  Matter  (Pages  136-­148)

Key  concepts:  (Page148)  • When  studying  matter,  it  is  important  to  know  the  location  of  safety  equipment  in  your  classroom  and  the  meanings  of  the  safety  icons  and  WHMIS  symbols.

• Matter  can  be  classified  according  to  its  composition,  as  mixtures  or  pure  substances.

• An  element is  a  pure  substance  that  cannot  be  broken  down  into  simpler  substancesthrough  physical  or  chemical  methods.

• A  compound is  a  pure  substance  that  is  composed  of  two  or  more  elements  that  are  chemically  combined.  A  compound  can  be  broken  down  into  its  elements  only  by  chemical  methods.

• The  production  and  use  of  new  chemicals  can  have  both  negative  and  positive  consequences.  Benefits  must  be  weighed  against  negative  consequences

Classification  of  Matter:1. Copy  down  Figure  4.3:  

Matter

Mixture Pure  Substances

Mechanical  Mixture        Solution   Element Compound

2.  What  is  matter?Matter  is  anything  that  has  mass and  occupiesspace.

Particle  Theory  of  Matter:  3.  List  the  particle  Theory  of  Matter.• All  matter  is  made  up  of  tiny  particles.• Each  pure  substance  has  its  own  kind  of  particle  which  is  different  from  the  particles  of  other  pure  substances.

• Particles  attract  each  other.• Particles  are  always  moving.• Particles  at  a  higher  temperature  move  faster,  on  average,  than  particles  at  a  lower  temperature.  

4.  Based  on  the  particle  theory  of  matter,  how  can  matter  be  classified?  List  examples  of  each.

Matter  

Mixture   Pure  substancesMatter  that  contains  more  than Matter  that  containsthan  one  kind  of  particle.                              only  one  kind  of  particle.

Examples:Water  is  a  pure  substance  but  salt  water  is  a  mixture  of  saltdissolved  in  water.Oxygen  gas  is  a  pure  substance  but  the  air  we  breathe  is  amixture  of  gases  that  includes  nitrogen,  oxygen,  carbon  dioxideand  other  components.

5.  Scientists  have  classified  pure  substances  into  two  main  groups.  Describe  each  one  and  list  examples  of  each.

Pure  substances

Element   Compoundis  a  pure  substance  that  cannot  be is  a  pure  substance  that  is  made  broken  down  further  by  chemical  or   of  two  or  more  different  elementsphysical  methods that  are  chemically  combinedzinc,  copper,  gold,  helium salt  (sodium  chloride),  water

6.  Differentiate  between  a  compound  and  a  mixture  A  compound  has  two  or  more  different  elements  that  are  chemically  compound.  While  a  mixture  has  two  or  more  particles  or  has  more  than  one  kind  of  particles.

SOLID/LIQUID/GAS

7.  List  different  ways  on  how  to  separate  mixtures.filtering  or  sifting,  distillation,  evaporation,  use  of  magnets,  and  by  hand

8.  Name  an  element  that  is  part  of  your  everyday  life,  and  describe  how  you  use  it.  

Gold/Silver:  wear  as  a  part  of  jewellery

Oxygen:  inhaled  and  transported  by  our  respiratory  system

Chemistry,  Society  and  the  Environment:9.  Summarize  some  of  the  important  issues  related  to  the  use  and  production  of  chemicals  by  copying  Figure  4.6.

Practice

• Page  148,  Questions  1-­5,  8