1. S2 SCIENCE CHEMICAL REACTIONS
REVISION

2. 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

3. The Periodic Table H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K CaTi 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

4. Solids, Liquids & Gases H He Li Be B C N O F Ne Na Mg Al Si P S Cl ArK 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

5. Q1. Metal or non-metal? H He Li Be B C N O F Ne Na Mg Al Si P S Cl ArK 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

6. Q3. Metal or non-metal? H He Li Be B C N O F Ne Na Mg Al Si P S Cl ArK 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

7. Q4. Metal or non-metal? H He Li Be B C N O F Ne Na Mg Al Si P S Cl ArK 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

8. Q5. Solid, liquid or gas? H He Li Be B C N O F Ne Na Mg Al Si P S ClAr 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

9. Q6. Solid, liquid or gas? H He Li Be B C N O F Ne Na Mg Al Si P S ClAr 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

10. Q7. Solid, liquid or gas? H He Li Be B C N O F Ne Na Mg Al Si P S ClAr 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

11. Q9. Solid, liquid or gas? H He Li Be B C N O F Ne Na Mg Al Si P S ClAr 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

12. Elements Both iron and sulphur contain only one type of atom Sulphur

13. 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

14. 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

15. A Mixture
A substance that contains more than one type of atom that are not chemically bonded (joined).
A mixture can be easily separated.

16. Mixture of iron and Sulphur

17. 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

18. Iron Sulphide

19. Hydrogen is a gas that burns with a squeaky pop!
Testing for Hydrogen
“POP”
Hydrogen is a gas that burns with a squeaky pop!

20. Place a glowing splint in the gas
Testing for Oxygen
Glowing splint
Place a glowing splint in the gas

21. Place a glowing splint in the gas
Testing for Oxygen
Glowing splint
Place a glowing splint in the gas

22. Oxygen will relight the splint
Testing for Oxygen
Oxygen will relight the splint

23. Testing for Carbon Dioxide
Carbon Dioxide will put out a flame

24. Testing for Carbon Dioxide
Carbon Dioxide will put out a flame