ZZTool
What is the periodic table?
The periodic table arranges every known element by atomic number and groups elements with similar electron configurations into the same column. This page covers all 118 elements with atomic mass, category, electron configuration, melting and boiling points, density, electronegativity and discovery year. You can search by name, symbol or atomic number, recolour the table by category, state or s/p/d/f block, and drag the temperature slider to watch each element turn from solid to liquid to gas — from near absolute zero up to several thousand degrees.
Features
Complete data including atomic mass, category and electron configuration
Locate an element by name, symbol or atomic number
Colour the table by category, state or s/p/d/f block
Drag the slider to see how the state of each element changes
Tips
- ✓Click any element to show its full properties in the panel below.
- ✓Lanthanides and actinides are listed in separate rows to keep the main table compact.
- ✓Electronegativity uses the Pauling scale — the higher the value, the stronger the pull on electrons.
- ✓Melting points, boiling points or densities that are not measured are shown as "Not measured".
FAQ
What is an atomic number?
The atomic number is the number of protons in the nucleus. It defines the position of an element in the periodic table and its chemical behaviour.
Why is hydrogen not an alkali metal?
Hydrogen sits in group 1, but it has only one electron and behaves as a nonmetal, which makes its properties quite different from the alkali metals.
Where do the melting and boiling points come from?
The values are taken from standard chemical reference data, mostly measured at normal atmospheric pressure. Values for superheavy elements are mostly predicted or not yet measured.
No comments yet