Interactive periodic table: 118 elements, trends and the atom in 3D
Search an element by name, symbol or number, or click it to see its atomic mass, period, group (except for the lanthanides and actinides), electron configuration and the atom in 3D. Four properties colour the table as a heat map, and an animation shows the order in which electrons fill the orbitals.
Opens without an account 3 times a day. A free account removes the limit.
- 118 elementswith atomic masses
- Search and 11 categoriesby name, symbol or number
- 4 properties in colourelectronegativity, radius, melting, boiling
- Atom in 3Dshells, protons and neutrons
What the periodic table of elements is
The periodic table is an arrangement of the chemical elements by rising atomic number, in rows (periods) and columns (groups). This interactive periodic table from EduFacturing shows all 118 elements with atomic masses.
The elements sit in 11 colour categories, from alkali metals to noble gases. For 84 the standard atomic weight is shown, and for the other 34 it is a mass number in brackets, for example [222] for radon.
What the periodic table shows for every element
Finds an element by name, symbol or number
The field takes "gold", "Au" or "79", and leaves only the matching elements lit. The buttons for the 11 categories filter by type.
Shows the main data for a chosen element
A click gives mass, number, symbol, period, group (except for the lanthanides and actinides) and block, the short and full electron configuration, the valence electrons, Hund's rule and a short description.
Colours the table by a property
Instead of by category you colour by electronegativity, covalent radius, melting temperature or boiling point. Cold is a low value, warm is high, and a grey cell with a dash has no measured value.
Draws the atom in 3D and the fill order
The atom rotates in 3D with a nucleus and electron shells. The Show fill order button runs an animation: electrons enter one by one and the cells light up in about 15 seconds.
When you need an interactive periodic table
You need a periodic table when you look up an element or want to see why the table is laid out this way.
A chemistry lesson
A student finds an element by name or symbol, reads its period and, where it has one, its group and checks how many valence electrons it has.
A quick look-up of mass and symbol
Gold is Au, number 79, mass 196.97. Search for "gold", "Au" or "79".
Comparing elements by a property
Switch the colouring and see the trends: fluorine has the highest electronegativity (3.98).
Electron configuration without a textbook
For chromium the panel shows [Ar] 3d⁵ 4s¹, an exception to the rule.
Where the numbers come from and how the table is coloured
The numbers come from the data in the app, and the electron configuration is derived, not copied.
The table
118 elements with number, symbol, names, mass, category and period; 88 of them have a group. The lanthanides and actinides (30 elements) are in two rows under the table, with no group, and the cells "57-71" and "89-103" point to their place.
Electron configuration
It is derived from the atomic number by the Madelung rule. 20 elements, for example chromium and copper, are entered as exceptions from NIST data.
Properties
Electronegativity on the Pauling scale, covalent radius from Cordero and colleagues (2008), melting and boiling points from the CRC Handbook at 1 atm. A missing value stays empty, it does not become zero.
Colours
The scale runs from cold turquoise to warm orange. For melting and boiling it is logarithmic, otherwise hydrogen, nitrogen and oxygen would come out in one colour.
| Applies to | Formula | Meaning |
|---|---|---|
| Fill order | n + l grows; on a tie the smaller n goes first | so 4s (4 + 0) fills before 3d (3 + 2) |
| Colour share for melting and boiling | (ln T − ln T_min) / (ln T_max − ln T_min) | T is in kelvin, with a smallest value of 1 K |
| Neutrons in the 3D atom | rounded mass − protons | approximate; exact only for masses in brackets |
Reference
Periodic table: core parameters
| Parameter | Value |
|---|---|
| Total elements | 118 |
| Periods | 1-7 |
| Groups | 1-18 |
| Electron blocks | s, p, d, f |
| Lanthanides | 57-71 (15 elements) |
| Actinides | 89-103 (15 elements) |
| Noble gases | He, Ne, Ar, Kr, Xe, Rn, Og |
118 elements, atomic masses per IUPAC 2021; radioactive elements use the mass number of the most stable isotope
Property heat maps, a 3D atom and the fill order
A property in colour, not a list
The scale names the element at both ends, for example "0.7 · Fr" and "F · 3.98" for electronegativity.
The configuration is derived
It is not a table of 118 copied rows: it is worked out by the Madelung rule, and the exceptions are listed separately.
Works with the keyboard
The arrow keys move focus between elements, Enter opens an element and Esc closes the panel.
There is no print or PDF button and no quiz. Oxidation states, isotopes, density and ionization energy are not separate fields. The texts about elements are short and do not replace a reference book.
The heat map has 4 properties: a value exists for 99 elements for electronegativity, 96 for radius, 103 for melting and 93 for boiling. From element 104 up the configuration is predicted, not measured.
The atom in 3D is the Bohr picture, not quantum mechanics: the nucleus is drawn far too large, and the neutron count is approximate. The app counts as valence electrons those of the outermost shell: 1 for chromium, 2 for iron.
Questions about elements, groups and electron configuration
Can you print the periodic table here?
No. The tool has no print or PDF button: the table is for viewing and searching on screen.
How many elements are in the periodic table?
118, from hydrogen to oganesson. For 84 the standard atomic weight per IUPAC 2021 is shown, for the other 34 a mass number in brackets. The lanthanides and actinides sit in two rows under the table.
How to read the periodic table?
The number is the count of protons, the row is the period and the column is the group. Click an element to see its period, block and valence electrons, and its group for 88 of the 118 elements (the lanthanides and actinides have none).
What is Hund's rule?
Electrons enter one per orbital of a subshell first and pair up only after that: nitrogen has three unpaired electrons and oxygen has two. The element panel shows it with arrows.
What is the electron configuration of chromium?
[Ar] 3d⁵ 4s¹, not 3d⁴ 4s². Chromium is one of 20 elements whose configuration differs from the strict filling order: in chromium the half-filled 3d subshell is more favourable.
Does the table show electronegativity and other trends?
Yes: electronegativity, covalent radius, melting temperature and boiling point, as a colour scale over the whole table.
Is the interactive periodic table free?
Yes, with a limit: without an account it opens 3 times a day, and a free account removes the limit.
The periodic table is free. Pro opens the rest
Pro costs 15 EUR a month and opens 45 Pro tools.
Related tools
Chemistry CalculatorFree chemistry calculator: molar mass from a formula, chemical equation balancing, dilution, pH of strong and weak acids and bases, and concentrations.
3D molecule model3D molecule model and crystal lattice builder: 12 molecules, 8 lattices, a shape from a formula, STL or 3MF to print. Part of Pro, 15 EUR a month.
Physics Constants & Formula SolverPhysics constants and formulas in one place: 17 constants from SI 2019 and CODATA 2022, plus 17 formulas to solve for any unknown, with unit conversion.
Scientific calculator and unit converterFree scientific calculator with unit converter: sin, cos, tan, logs and roots, plus 53 units in 8 categories. Online, no account needed.
Find an element and see its properties
Opens without an account 3 times a day. A free account removes the limit.