S2 SCIENCE CHEMICAL REACTIONS by sdfwerte

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									      S2 SCIENCE
CHEMICAL REACTIONS
      REVISION
             An Element

• A simple type of substance that can’t be
  broken down into other substances.

• A substance that contains only one type of
  atom.

• Elements are listed on the periodic table
              The Periodic Table
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
        Solids, Liquids & Gases
                     H                                          He

Li Be                                     B    C    N   O   F   Ne

Na Mg                                     Al   Si   P   S   Cl Ar

K   Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr   Y   Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te          I   Xe

Cs Ba La Hf Ta W Re Os Ir        Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac
             Q1. Metal or non-metal?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
             Q3. Metal or non-metal?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
             Q4. Metal or non-metal?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
             Q5. Solid, liquid or gas?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
             Q6. Solid, liquid or gas?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
             Q7. Solid, liquid or gas?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
             Q9. Solid, liquid or gas?
                      H                                              He

Li Be                                         B    C    N   O   F    Ne

Na Mg                                         Al   Si   P   S   Cl   Ar

K    Ca Sc   Ti   V   Cr Mn Fe Co Ni Cu Zn Ga Ge As Se          Br Kr

Rb Sr   Y    Zr Nb Mo Tc Ru Rh Pd Ag Cd       In   Sn Sb Te     I    Xe

Cs Ba La Hf Ta        W Re Os   Ir   Pt Au Hg Tl   Pb Bi    Po At Rn

Fr   Ra Ac
               Elements




   Sulphur                     Iron
• Both iron and sulphur contain only one type
  of atom
What is a Chemical Change?
  In a chemical change, a
  new substance is made.
   This is an irreversible
          process.

 Reactants                   Products

Acid + Metal            Hydrogen + Salt
How to spot a chemical reaction

When substances are mixed, a chemical
  change has taken place if…
• Bubbles are given off
• Mixture warms up or cools down
• An original substance disappears or a
  new substance appears
• A colour change occurs
            A Mixture
• A substance that contains more than
  one type of atom that are not
  chemically bonded (joined).

• A mixture can be easily separated.
Mixture of iron and Sulphur
            A Compound
• A substance that contains more than one
  type of atom chemically bonded together.

• Compounds are formed when elements
  react together

• Compounds can not be easily separated
Iron Sulphide
Testing for Hydrogen




            “POP”




Hydrogen is a gas that burns
    with a squeaky pop!
Testing for Oxygen

                 Glowing splint




Place a glowing splint in the
            gas
Testing for Oxygen

                 Glowing splint




Place a glowing splint in the
            gas
Testing for Oxygen




Oxygen will relight the splint
Testing for Carbon Dioxide




   Carbon Dioxide will put out a
              flame
Testing for Carbon Dioxide




   Carbon Dioxide will put out a
              flame

								
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