Download - S2 SCIENCE CHEMICAL REACTIONS
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S2 SCIENCES2 SCIENCE
CHEMICAL REACTIONSCHEMICAL REACTIONS
REVISIONREVISION
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An ElementAn Element
• A A simplesimple type of substance that can’t type of substance that can’t be broken down into other substances.be broken down into other substances.
• A substance that contains only one A substance that contains only one typetype of atom. of atom.
• Elements are listed on the periodic tableElements are listed on the periodic table
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The Periodic TableH 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
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Solids, Liquids & Gases
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
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Q1. Metal or non-metal?Q1. Metal or non-metal?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
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Q3. Metal or non-metal?Q3. Metal or non-metal?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
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Q4. Metal or non-metal?Q4. Metal or non-metal?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
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Q5. Solid, liquid or gas?Q5. Solid, liquid or gas?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
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Q6. Solid, liquid or gas?Q6. Solid, liquid or gas?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
![Page 10: S2 SCIENCE CHEMICAL REACTIONS](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813095550346895d966f9f/html5/thumbnails/10.jpg)
Q7. Solid, liquid or gas?Q7. Solid, liquid or gas?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
![Page 11: S2 SCIENCE CHEMICAL REACTIONS](https://reader036.vdocuments.net/reader036/viewer/2022062321/56813095550346895d966f9f/html5/thumbnails/11.jpg)
Q9. Solid, liquid or gas?Q9. Solid, liquid or gas?
AcRaFr
RnAtPoBiPbTlHgAuPtIrOsReWTaHfLaBaCs
XeITeSbSnInCdAgPdRhRuTcMoNbZrYSrRb
KrBrSeAsGeGaZnCuNiCoFeMnCrVTiScCaK
ArClSPSiAlMgNa
NeFONCBBeLi
HeH
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SulphurSulphur IronIron
Elements
• Both iron and sulphur contain only one type of atom
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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
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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
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A MixtureA Mixture
• A substance that contains more than one type of atom that are not chemically bonded (joined).
• A mixture can be easily separated.
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Mixture of iron and Sulphur
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A CompoundA 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
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Iron SulphideIron Sulphide
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Testing for Hydrogen
“POP”
Hydrogen is a gas that burns with a squeaky pop!
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Testing for Oxygen
Place a glowing splint in the gas
Glowing splint
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Testing for Oxygen
Place a glowing splint in the gas
Glowing splint
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Testing for Oxygen
Oxygen will relight the splint
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Testing for Carbon Dioxide
Carbon Dioxide will put out a flame
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Testing for Carbon Dioxide
Carbon Dioxide will put out a flame