Periodic Table
Tap an element to see its details.
Periodic Table — kitbench.net
Tap an element to see its details below the table.Tap an element to see its details. Atomic weights: CIAAW 2024 · other data: PubChem
Everything runs on this page. Your color choice and quiz records stay in this browser only.
How to use
- 1. Tap an elementA summary appears in the empty space at the top of the table and a details card below it (on phones the card slides up).
- 2. Change the colorsSwitch from Category to state, block, electronegativity, atomic radius, ionization energy, melting point, boiling point, density or year of discovery. In State, move the temperature slider to see which elements are solid, liquid or gas.
- 3. Search, learn, printType a name, symbol or number to highlight it. Quiz asks you to find elements by name; Print gives a one-page landscape sheet in color or black and white, with or without names.
What the colors show
Category groups elements with similar behavior: alkali metals, halogens, noble gases and so on. Tap a legend item to highlight just that group.
For electronegativity, ionization energy, atomic radius and the other values, darker means larger. You can see the trends at a glance: electronegativity rises toward the top right, atomic radius grows toward the bottom left.
Where the data comes from
Atomic weights are the 2024 abridged standard atomic weights published by CIAAW, the IUPAC Commission on Isotopic Abundances and Atomic Weights. In 2024 the values for zirconium, gadolinium and lutetium were revised.
Other values (electron configuration, electronegativity, atomic radius, ionization energy, electron affinity, melting and boiling points, density, year of discovery) come from the PubChem periodic table of the U.S. National Library of Medicine.
Sources: CIAAW abridged standard atomic weights, PubChem periodic table
Electrons per shell
Electrons fill shells from the nucleus outward. The card adds up the electrons in each shell from the electron configuration. Iron (Fe), for example, has 2, 8, 14, 2.
FAQ
Who is this for?
Middle and high school students who need to check an element's values while studying chemistry. Science teachers who want a blank worksheet or a table to project in class. University students and people who use chemistry at work and want atomic weights or electron configurations fast. Anyone learning element symbols with a quiz.
When is it handy?
Checking an atomic weight or electron configuration in the middle of a problem set. Comparing trends such as electronegativity or atomic radius by color. Testing yourself on where the first 20 elements sit before an exam. Printing a blank periodic table to practice filling in.
Where does the data come from?
Atomic weights are the 2024 abridged standard atomic weights from CIAAW, the IUPAC commission that sets them. Other values, such as electron configuration, electronegativity, atomic radius, melting and boiling points, density and year of discovery, come from the PubChem periodic table of the U.S. National Library of Medicine. The sources are also listed under the table and on each card.
Why do some atomic weights differ slightly from my textbook?
This table uses the 2024 abridged standard atomic weights from CIAAW, the IUPAC commission that sets them. Textbooks use the values from when they were written and may round to a different number of digits.
What do the numbers in [ ] mean?
These elements have no stable isotopes and no standard atomic weight. The number in brackets is the mass number of a representative isotope.
Why do some elements show — for melting or boiling point?
They are mostly synthetic elements made only in tiny amounts, and the source data (PubChem) has no value for them.
What can I color the table by?
Category, state and block, plus electronegativity, atomic radius, ionization energy, melting point, boiling point, density and year of discovery. For numeric values, darker means larger (density uses a scale that keeps its huge range readable). Tap a legend item to highlight just that group.
What does the temperature slider in State show?
Move it anywhere from 0 to 6,000 K and each element is colored solid, liquid or gas at that temperature, based on its melting and boiling points. Elements without data show as unknown. You can show the temperature in °C, K or °F. The card's state at room temperature is PubChem's value as given.
How do I find an element?
Type a name, symbol or atomic number in the search box and the match lights up. Accents and capital letters don't matter. When only one element matches, it is selected.
How does the quiz work?
Press “Quiz” and an element name appears; tap that element in the table. Choose elements 1–20, 1–36 or all 118. Each round has 10 questions, and names are hidden from the table while you play. If you get all 10 right on the first try, your time is kept in this browser as your best.
Can I print it?
Yes. Tap Print to choose color or black and white, and whether to show element names (hide them for a blank worksheet). It fits on one landscape page.
Can I print a blank periodic table?
Yes. Under Print, choose what to show: everything, no names, numbers only (no names or symbols), or a completely blank grid. For a PDF, pick “Save as PDF” in the print dialog.
How are valence electrons counted?
Only for s- and p-block elements: groups 1 and 2 have 1 and 2, groups 13 to 17 have the group number minus 10, and noble gases have 8 (helium 2). Transition metals and the f-block are left out because there is no single way to count them.
Does it work on phones?
Yes. On a phone the whole table fits the screen width with symbols only, so there is no sideways scrolling. Tap an element and the details slide up. To see the table larger, press “Zoom in” and scroll sideways.
Can I share a link to one element?
Use Copy link on the card to get a link that opens that element (for example …/periodic-table/#Fe). The atomic number works too (#26).
Is anything I pick or my quiz score sent anywhere?
No. The table runs in this page. Your color choice, temperature unit, quiz range and best times are saved only in this browser.
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