Edexcel IAL Chemistry AS 2.18 Period 2 and 3 trends
Edexcel IAL Chemistry AS 2.18 Period 2 and 3 trends
Identify the trend or anomaly from data, select the relevant atomic or structural factor and compare attraction or bond strength before stating the property change.
How this is tested
- Explain ionisation-energy trends through nuclear charge, shielding and atomic radius.
- Explain subshell or paired-electron anomalies using configuration and repulsion.
- Interpret melting points through metallic, giant covalent or molecular structure.