Chemistry

2. an electron pair acceptor
5. loss of electrons in a chemical reaction
9. a state of balance or stability in a system
10. a functional group composed of a carbon atom double bonded to an oxygen atom
13. a measure of disorder in a system
14. atoms with the same number of protons but different numbers of neutrons
15. minimum energy required to start a reaction

1. a large molecule made up of repeating units
3. the gain of electrons
4. undergoes electrophilic addition
6. shape with four bonds around a central atom at 109.5 degrees
7. the enthalpy change when gaseous ions dissolve in water
8. molecules with the same molecular formula but different arrangements in space
11. organic compound containing a ring of delocalised electrons
12. the technique used to determine the concentration of a solution