New GCEs for 2008
GCE Chemistry (2420)
AS outline
At AS Level candidates are given a solid grounding in foundation Chemistry. The specification introduces the chemical reactivity of atoms and molecules and provides an understanding of their structures The development and use of periodic table is explained. The introduction of Practical Skills Assignments (PSA) into the specification allows teachers to credit candidates for work done in routine class practicals. Assessment becomes linked to the work of the course, and moves away from formulaic testing.
The AS specification has 3 units:
Unit 1: Foundation Chemistry
Topic list
- Particles, composition of the nucleus, isotopes and use of mass spectrometer
- Calculating the amount of substance
- Ionic, covalent and metallic bonding and intermolecular forces
- The construction of the periodic table
- Organic chemistry
- Alkanes from crude oil.
Assessment
| Written Paper: | 1 hour 15 minutes |
| Weighting: | 33% of total AS Level marks |
| 16% of total A Level marks |
4 - 6 short answer questions plus one or two longer structured questions.
Unit 2: Chemistry in Action
Topic list
- Collision theory and effect
- Definitions of oxidation and reduction
- Redox properties of halogens and halide ions
- The extraction of Metals
- Haloalkanes and alkenes.
Assessment
| Written Paper: | 1 hour 45 minutes |
| Weighting: | 46% of total AS Level marks |
| 23% of total A Level marks |
6 - 8 short answer questions plus two longer questions.
Unit 3: Investigative and Practical Skills - Internal Assessment
Topic list
- Making observations and measurements
- Analysing and evaluating results.
Assessment
| Internal Assessment | |
| Weighting: | 20% of total AS Level marks |
| 10% of total A Level marks |
Teacher assessment of practical skills (PSA) 12 marks.
Teacher assessment of investigative assignment (ISA) 38 marks.