Across
- 4. The simplest reaction in which two or more molecules join to form a bigger one.
- 8. These are mirror images of each other but are not identical to each other.
- 9. This is a reaction where the results is one pi bond being converted into a sigma pond or the other way round.
- 11. When energy is absorbed from the surroundings into a system, which causes the standard enthalpy change to a positive value.
- 12. This is a thermodynamic quantity in which is a measure of the degree of disorder within any given system.
- 14. When energy is transferred to the surroundings resulting in the standard enthalpy change to be a negative value.
- 15. A substance which speeds up reactions when added.
- 16. A chemical reaction between an acid and a base.
- 17. This is when one functional group in a chemical compound is replaced by another functional group.
- 19. This happens when a molecule rearranges itself to form one or more products.
- 20. This is a process that increases the co ordination number and oxidative state of a metal centre
Down
- 1. A chemical species that forms bonds with nucleophiles by accepting an electron pair.
- 2. This is when two substituents are removed from a molecule by a one or two step mechanism.
- 3. This reaction includes a transfer of electrons between two species.
- 5. A broad type of reaction when the carbon skeleton of a molecule is changed to give a structural isomer of the initial molecule.
- 6. This is the lowest amount of energy required to make the atoms or molecules undergo chemical reactions.
- 7. Any chemical reactions which include free moving radicals.
- 9. This is the phase in which both reactants and products are present in concentrations that do not have any further tendency to change over time, so that there is no apparent change in the system's properties.
- 10. An object or molecule does not possess symmetry.
- 13. This is caused in the form of light by absorption of heat.
- 18. This is a chemical species which provides electrons to form a covalent bond.