Chemistry Help UKModels and investigations
Periodic table explorer
Choose an element to compare its properties and explain the chemistry
More tools
Group numbers run from 1 to 18
Select from the list below or enlarge the conventional table
Atomic weights: CIAAW abridged values. A dash means no standard atomic weight. The separated rows keep the lanthanoids and actinoids together.
Compare the evidence
Connect ionisation energies with the electrons being removed
Graph values and definitions
Complex ions in three dimensions
Count donor atoms and compare their positions around the metal
Drag to rotate, or use the buttons. Bond lengths are schematic.
Element specimens
The table still includes elements without an illustrated specimen. Extremely short-lived atoms cannot be collected into a visible bulk sample.
Use the evidence
Choose tests, record observations and explain a conclusion
Your notebook
Keep your own explanations and a useful place to return
Beyond your specification
Follow a question further, with the course boundary kept visible